The Ultimate Guide To Speeding Up Firefox 3.5

Mahendra Palsule 01-08-2009

firefox-128I like Firefox but it’s not as fast as it used to be. This is a comprehensive, safe guide to optimizing Firefox 3.5 for speedy browsing. For each suggestion, your mileage may vary. Before you proceed, create a new profile.


Quit Firefox, run “firefox.exe ““profilemanager”, and create a new profile to experiment on. Use the new profile as your default only if your performance improves. Only those changes needed from a default installation are mentioned in this guide.

1. Use an Optimized Build of Firefox

If you’re using Windows, use an optimized build of Firefox 3.5.1 for your processor. Use Swiftfox for Linux.

2. Use Blank Homepage, Default Theme, Minimal Extensions

Set your homepage How To Set Your Browser Homepage in 5 Browsers Read More to about:blank. Use only must-have extensions with the default theme. Use Adblock Plus and Flashblock to block unwanted How To Block Annoying Ads in Firefox Read More ads and Flash.

3. Optimize Download Options

In Options->Main, choose a folder for your downloads and save all downloads to it automatically. Close the download window automatically when all downloads are finished. Turn off download history in Options->Privacy, Custom settings for history.



4. Customize Content Type Handling

In Options->Applications, modify the following Content Types:


In general, open files separately, rather than from within the browser wherever possible.


5. Increase Cache, Reduce History Size

In Options->Advanced->Network, increase Offline Storage (size of the disk cache) to 150 MB.


In Options->Privacy, use Custom settings for history, and reduce length of remembered history to 15 days.



6. Customize General Advanced Options

In Options->Advanced->General->Accessibility:

  • Check Search for text when I start typing
  • Uncheck Use smooth scrolling
  • Turn off spell checker if you ROTFLMAO on forums and don’t aspire to be a writer. Keep it on if you’re looking for a job.
  • Uncheck Always check to see if Firefox is the default browser on startup. On Windows, set Firefox as your default browser using Program Access and Defaults How To Disable Internet Explorer Read More .


7. Remove Unused Search Engines

Drop-down In the search box, select Manage Search Engines“¦, and remove any search engines that you will never use.



8. Clean up bookmarks, avoid Live Bookmarks

If you have a lot of bookmarks in Firefox, you might have dead links, or even duplicate bookmarks. Clean them up using the CheckPlaces Firefox extension, and uninstall after you’re done.

Firefox checks Live Bookmarks every hour for updates. Use a dedicated RSS Reader like Google Reader instead. Delete the preset Latest Headlines Live Bookmark.

9. Performance Enhancing Extensions

If you prefer a nice GUI to tweak advanced settings, use these performance enhancing Firefox extensions. If you are the DIY type, these optimizations (and many more) are covered in the next sections.

  • FasterFox 3.8.1 Lite is an (experimental) add-on that lets you choose from four presets (or use a custom profile) to optimize Firefox.
  • Tweak Network 1.3 allows you to choose from Default and Power profiles for tweaking network settings in Firefox.

Advanced About:Config Tweaks

The following two sections are advanced Firefox configuration changes that are simple to make. Enter about:config in the Firefox address bar in an empty tab. Click “˜I’ll be careful, I promise!’. You can use Firefox’s Safe Mode How to Use Mozilla Firefox in Safe Mode Read More and select “˜Reset all user preferences to Firefox defaults’ to undo any changes you make. Also, entries you change are displayed in bold, and can be reset using the right-click context-menu.

If an entry does not exist, create it by right-clicking on an empty space, selecting New, and choosing the type of entry as listed.


10. Advanced Browser Settings

You can use these recommended values or tweak them as per your system, preference, and browsing habits.

  • accessibility.typeaheadfind.enablesound [Boolean]: Change to False to avoid a sound alert if no match is found when you search for text.
  • alerts.totalOpenTime [Integer]: Reduce time to show Download Complete alerts to 2000 (2 seconds).
  • browser.bookmarks.max_backups [Integer]: Reduce number of bookmark backups to speed up shutdown from 5 to 2.
  • browser.cache.disk.parent_directory [String]: Move your Firefox cache to a disk or partition different from your Windows drive by specifying the folder path here.
  • [Integer]: Don’t open Downloads window for very short downloads. Set to 2000 (2 second delay).
  • browser.sessionstore.max_tabs_undo [Integer]: Reduce number of closed tabs you can undo from 10 to 4.
  • browser.sessionstore.max_windows_undo [Integer]: Reduce number of closed windows you can undo from 3 to 1.
  • browser.tabs.closeWindowWithLastTab [Boolean]: Change to False, so that Firefox doesn’t accidentally shut down when you close the last tab.
  • browser.urlbar.maxRichResults [Integer]: Reduce maximum number of results in Awesome Bar from 12 to 6.
  • dom.popup_maximum [Integer]: Reduce maximum number of simultaneous popups from 20 to 3 or 5.
  • security.dialog_enable_delay [Integer]: Reduce delay to wait before installing a new extension to 1000 (1 second). Setting to zero is not recommended because of security risks.

11. Advanced Network Settings

These changes are recommended for broadband users with at least a 2 Mbps (256 kB/s) connection.

  • network.dnsCacheEntries [Integer]: Increase number of DNS entries cached from default 20 to 512.
  • network.dnsCacheExpiration [Integer]: Increase number of seconds DNS entries are cached from default 60 to 3600.
  • network.dns.disableIPv6 [Boolean]: Disable IPv6 if your ISP doesn’t support it (most don’t).
  • network.http.max-connections [Integer]: Increase maximum number of simultaneous connections to 48 or 96.
  • network.http.max-connections-per-server [Integer]: Increase maximum connections per server from default 15 to 24.
  • network.http.max-persistent-connections-per-server [Integer]: Increase maximum persistent connections per server from default 6 to 12.
  • network.http.pipelining [Boolean]: Change to True to enable HTTP Pipelining.
  • network.http.pipelining.maxrequests [Integer]: Increase from default 4 to 8.
  • network.prefetch-next [Boolean]: This specifies whether Firefox pre-fetches web pages (and associated cookies) even before you visit them. It is most frequently used to pre-load the first result of a Google search. If you want to improve security and don’t want Firefox to load pages you never actually visit, change this to False. See the FAQ for more information.

Did these optimizations make your Firefox 3.5 faster? Tell us in the comments!

(Some of these tips are via Tweakguides Firefox Tweak Guide)

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  1. LIC India
    February 3, 2010 at 11:28 am

    Amazing! Thanks for sharing these :)

  2. Adam K.
    February 2, 2010 at 5:10 pm

    Wow! That's GREAT!

  3. Oron
    January 22, 2010 at 1:43 pm

    Wow, never seen so much excited activity on the makeuseof comments! Browser wars again? Anyway, nice article, though as some have suggested you perhaps should have indicated what the changes do, since some of the settings are more a matter of personal preference than speed as such.

  4. Vasto_Lorde
    January 20, 2010 at 10:43 am

    in fact increasing your DISK cache size helps you to save bandwidth.

    and all on this guide is absolutely useful.

    why I say that? workin over 5 years on a internet cofee with 30 mid-end pc's testing various web browsers.

  5. Stephen
    January 20, 2010 at 9:09 am


    I'm not sure what's up with all these negative feedbacks here. But I've been working with computers now for just over 10 years and I found your guide to be extremely helpful. There are things here I've never actually thought about so well done. Firefox now runs a lot better!


  6. matt
    January 11, 2010 at 8:43 am

    the article is wrong.

    first of removing unused search engines ..etc in NOT going to do anything.

    and in most cases, increasing your cash size actually SLOWS DOWN your browser. (bigger is not better). leave it at default.

    source= computer tech and junkie for 15 years.

    PLEASE dont write about stuff you clearly know nothing about.

  7. Sima
    December 21, 2009 at 12:03 am

    Thanks a lot, My firefox is more better now,, your tips decrease the cpu usage of firefox in my pc....

  8. Greenman
    December 17, 2009 at 11:58 am

    I used these and it did make a big difference in my browswer speed. I had pages lagging all over the place and I have a fast machine but the web was another story. Now it is really fast. Thanks

  9. MozillaFans
    December 15, 2009 at 11:30 pm

    Thanks for your guide...This is useful...Hope for more update...

  10. j
    December 5, 2009 at 6:23 am

    dont do the dns cache update it screws with the time it takes the page to load

  11. Suzannah
    November 20, 2009 at 6:26 pm


    I am one of those folks that the author wonders about. I don't comment often, but I am counted amongst the feeds and I am a regular reader, probably more so than some of the folks here who like to show how smart they are by bashing the writer. blah.

    I have LOTS of extensions. Nonprofit work requires that you yourself are the SEO, the marketer, the web developer, the reader, and the main pr person (lots and lots of social media). So I have to have lots of extensions.

    And these recommendations showed a significant difference.


  12. mike
    November 14, 2009 at 7:45 pm

    doesnt fasterfox take care of most of the about:config tweaks?

  13. MikeVertx
    September 11, 2009 at 8:29 am

    on the tips, to be honest the basic / easy changes as many have all-ready mentioned, are useless other then to sort of clean things up (i.e remove unused search engines, remove unused extensions)... the more indepth changes I didn't bother with (config/advanced) because well firefox would just adjust those settings themselves in the next launch if it was needed.

    if you run firefox stand-alone it runs pretty smooth, but once I install my must have essential collection pack of plug-ins, even limited to a core group that I use on every machine, it has been slowing down dramatically... to where when I type sometimes I have to wait for the computer to catch up with the letters appearing.

    My laptop is a fairly new 4gb 320hd windows vista 64 pc. my office desktop which is older tends to run firefox faster/smoother on it (maybe due to my heavy multi-tasking on my personal laptop vs my only for work browsing/usage at the office).

    I've actually been getting pretty dissapointed with the memory firefox uses when left open with multiple tabs for long lengths of time...that is one thing that needs to be fixed like for example if it could be set to "refresh" the page automatically say every 20-30minutes so it's not using all that memory...I'm awaiting the next release because right now I've been loyal since day one of mozilla but getting very tempted to switch to opera

  14. Vasto_Lorde
    September 9, 2009 at 5:39 pm

    there are some fantastic addons that would make it even faster
    they are the following:

    vacuum places improved

    I work on an internet cofee, these addons helped me a lot saving some bandwidth and managing the cache in firefox.

    by using this addons you could speed up your firefox a 15% more.

    remember always to use adblock plus to block ads,save bandwidth and speedup your browsing.

    btw: great guide ^^ nice work.

    • AriesWarlock
      September 21, 2009 at 1:44 pm

      Vasto_Lorde (Bleach fan I assume?), I was trying bettercache since it seemed like a good idea, but it gave me serious trouble using the add-on Gmail manager to check 2 accounts. Like I can log into one, but if I want try to log in into the other account, I am logged into the first one. Do you know a way to fix this? Thanks.

      • Vasto_Lorde
        September 21, 2009 at 8:33 pm

        configure gmail to use https connection

        and set bettercache to not cache on SSL or secure connections

        XD have fun!

        • AriesWarlock
          September 22, 2009 at 12:53 pm

          Hmm actually, I selected don't use https connection, and it's working :S Thanks!!

  15. Jacki
    September 8, 2009 at 2:00 am

    Yep ! Its did excellent.

  16. Dionysis Zindros
    August 9, 2009 at 7:21 pm

    Maybe I'll just keep using Chrome. I switched to it when I decided Firefox was becoming way too slow.

  17. pingo
    August 9, 2009 at 9:09 pm

    You are incorrect about there not being any benefit to removing useless search engines, and also about closing the download window. Granted that the effects of these two particular tweaks are minor, nonetheless, they are a beneficial tweak in the totality of all that was presented.

  18. Ajmaal Firdowzi
    August 8, 2009 at 12:04 pm


    Thanks a million man. This is a great post. Great commitment & Well explained. I will do exactly what this post says.

    I hope that this update will provide me features as the site above mentioned. I am hoping for the best of results.

    Thanks again. This is exactly what I wanted.
    I will update you with my results.


  19. bogas04
    August 8, 2009 at 6:47 am

    Seems like this tutorial has helped me!

    Now my firefox loads a bit faster and hangs less on opening new tab

    Moreover it loads pages a bit more faster

    By the way , can you tell me why cant we set the delay on adding extensions to 0 or say , 1 , how will it affect security?

    Whatever , + 1,000 heheehe

  20. CCCP
    August 5, 2009 at 8:22 am

    optimize from time to time sqlite entries and remove the trash inside. its called vacuum by sql lite as by sql known as optimize. 2 ways use sqlite manager in ur profile folder to ran vacuum one by one *.sqlite or download sqlite3.exe from and copy to profile folder, open dos command prompt and type to optimize all: for %i in (*.sqlite) do @echo VACUUM; | sqlite3 %i

  21. James
    August 4, 2009 at 12:25 pm

    Be careful. I tried these about:config tweaks and they slowed down my browser. Couldn't open up some pages. Went back and undid everything. I think I was able to undo the damage. Firefox is as fast as it's going to get. Chrome, on the other hand, is on another level. Once Chrome comes up with the extensions, Firefox is going to start sliding.

  22. Tecnopassion
    August 3, 2009 at 6:15 pm

    Italian version at:

  23. Ben
    August 3, 2009 at 11:26 am

    Very good Guide!

  24. the_guv
    August 3, 2009 at 10:16 am

    as usual from Make Use Of, crackin'.

    Big cheers Mahendra

  25. Samuel Dionne-Riel
    August 3, 2009 at 12:34 pm

    Some of the advanced network tweaks you are promoting makes you and the users of them bad internet citizens (netizens). Those values were (I hope) carefully chosen by the Mozilla team so that it would give the best performance without being "harmful" to the servers and other users.

    Here's a list of the settings you shouldn't touch and why:

    - network.http.max-connections-per-server: This will cause problems if the server is receiving a great amount of connections (think a dugg ou slashdotted server). This will restrict access for other users as an HTTP server is configured to have a maximum amount of open connections. If everyone ups their max connections per-server by, let's say, the double, this will, in theory, halve the maximum concurrent users the server can handle. This will be true with sites with many included content (images, css and scripts).

    - network.http.max-persistent-connections-per-server: Don't increment this! It will reuse connections for fetching things, yes it will be faster, but at the expense of hogging more connection slots of the server. See last point for more details.

    - network.http.pipelining: This will make use of the persistent connections to ask multiple files at once, this should not harm, but is recommended to be activated only on high latency networks (dial-up, satellites or cellular for examples)

    - network.prefetch-next: NO! This is actually harmful and of really bad netiquette! Unless you will always load the first google result, this is a bad behavior as this will increase the load on popular websites and actually skew their viewing statistics.

    Anyway, this is all open for interpretation, but a good netizen will never risk hampering the experience of others only for their own pleasure.

  26. Arun
    August 3, 2009 at 5:10 am

    speed is ok for there anyone having that "server not found issue"..

    Please reply

  27. Arun
    August 3, 2009 at 5:09 am

    Well,they have to fix their "server not found error" which is irritating me and many of the Firefox fans...

    Do u guys know how can i fix this error...i have to refresh 4 to 5 times to get the site load.....

  28. Mahendra Palsule
    August 3, 2009 at 10:08 am

    @Everyone with ‘Server Not Found’ errors: This is a problem faced by many Firefox 3.5 users. I think we will have to wait for an official update.

    Meanwhile, some users have reported that disabling IPv6 and network pre-fetch (as described in the Advanced Network Settings section in my article) has greatly reduced the problem. As always, your mileage may vary.

  29. David Pratt
    August 3, 2009 at 3:35 am

    What would be nice is a little extension to tell you what overhead each extension adds to FF, including how much it adds to the startup time.

  30. Ken Saunders
    August 3, 2009 at 2:48 am

    I'll admit that it's a good collection of tips and tweaks, but there should have been explanations for each one describing how and why the suggested settings will increase performance.

    I wouldn't recommend to anyone to just blindly alter Firefox's default settings without them having the knowledge of how it will affect the functionality of Firefox especially about:config settings.

    Add-ons are the biggest factors that affects Firefox's performance. Firefox out of the box in its default state starts up, loads, and renders very fast.
    If it didn't, then the turnover rate at Mozilla would be really high.

    I'm not necessarily trashing this post because like I said, it's a good list (could have been a great one had descriptions been added), but the fact is that the lighter something is, the faster it will be so this post primarily suggesting removing features and decreasing the functionality of Firefox is saying just that, make Firefox lighter and it will be faster.
    And if that is the way to go, and people want a lighter, faster(?) browser with less functionality, features, and add-ons, then perhaps they should use Chrome.

    One more point.
    Assigning an external program a task that Firefox typically handles (viewing PDF's etc) is just an illusion of increased performance and time saving considering that a person needs to launch a whole other program to handle the task that Firefox normally would have.

    Finally, this site should really consider using keyword filtering in the comments.
    It really reflects as poorly on the site as it does the idiot who is posting trash when a visitor comes here and reads what is highly offense and inappropriate content. Or at the very least, get a moderator.

  31. mchlbk
    August 3, 2009 at 2:45 am

    Re Chrome:

    I agree, it's a very promising project. On my machine it's faster and more stable than Firefox. I need my addons, though, so making a complete switch to Chrome is not (yet) an option.

    Will follow this project though, it's progressing very fast.


  32. dorkrally
    August 3, 2009 at 2:32 am


  33. Prateek
    August 3, 2009 at 1:34 am

    Oh... its an amazing guide... must read for a Firefox user...

  34. yoyo
    August 3, 2009 at 12:27 am

    lol... 3.5 is fast. The tweaks do help but 3.5 is pretty damn fast compared to 3.0
    This coming from testing on a page with about 8000 DOM elements. Grow up ppl and stop calling each other names. Do you need to do that to prove your point?

  35. Shantanu Oak
    August 2, 2009 at 11:42 pm

    Another option that make my browsing faster is eselecting the Load images automatically option from Content tab.

  36. Shantanu Oak
    August 2, 2009 at 11:28 pm

    Thanks for these useful tips.
    I usually deselect the check for updates option.

    options - Advanced - Update - Automatically check for updates

    • Mahendra Palsule
      August 2, 2009 at 11:39 pm

      @Shantanu: Yes, that helps. I didn't include it in the guide as it cannot be universally recommended. We can't expect folks to intentionally keep an eye out for new Firefox releases!

  37. Anant Shrivastava
    August 2, 2009 at 11:18 pm


    First of all good work in compiling all these tips..

    second congrats on reaching digg home page.

    and last but not least.

    I suggest you use backtype wordpress plugin to get the digg comments also on this post...

    Hope that helps.

  38. Anant Shrivastava
    August 2, 2009 at 11:06 pm

    Hi Mahendra,

    thanks for the large collection of tweak tips..

    also congrats on hitting digg cover.

    besides that as you can see 49 or so comments on your blog and still around 211 comments on your digg post.

    I would suggest using backtype plugin to wordpress so that you can pull all the comments at one place.

  39. You
    August 2, 2009 at 9:52 pm

    I really like the high tension of the flame warriors on this particular blargh post. I'm guessing sexual repression is to blame for the angry nerds.

  40. RHPT
    August 2, 2009 at 9:51 pm

    These tips made my FF slower.

  41. Sonny
    August 2, 2009 at 9:36 pm

    I sped up Firefox by using Chrome. :)

  42. Donsnyc
    August 2, 2009 at 9:06 pm

    Thank you for the tips!

  43. MicroShaft_Rob
    August 2, 2009 at 5:37 pm

    Here is my 'even better way' to make Firefox faster.

    *Ununstall Firefox
    *Install Opera


    • Lockon
      August 2, 2009 at 9:50 pm

      you and opera su cks

  44. mchlbk
    August 2, 2009 at 4:06 pm

    Any idea how to tweak Firefox for the Intel Atom pocessor?

    I'm on a netbook running Ubuntu 9.04. Have looked into Swiftfox but it seems there's no build for the Atom processor.

    (Very good article btw.)

  45. Sam
    August 2, 2009 at 4:00 pm

    Nice Ben! It's people like you who help us avoid unnecessarily excess tweaking. Not to mention we learn a little, here and there.

    The commenter 'hi' above is a little harsh. I think Ben's expertise in the subject matter would at least be a benefit rather than produce any harm. I mean, why would ANYONE want to waste time on tips that you really don't need?

    You need to learn some manners.

  46. Joe
    August 2, 2009 at 3:59 pm

    Awesome Guide! Thanks

  47. Raj
    August 2, 2009 at 2:55 pm

    Nice Tips!!. i only had one of the tweaks done already.which effected alot. but now i am gonna try all of them.FF is probably the fastest browser out there though.

    @ chung YOu can go F**K Your self

  48. Ben
    August 2, 2009 at 2:29 pm

    Even though Chung was a bit rude, he's completely right! Most of these tips are just downright useless. Tips 3,4,6,7,8 have absolutely NO effect in speeding up Firefox. They only make things more convenient for users who follow this blog author's way of using firefox. The only tips with any credence are the advanced network tweaks.

    I don't get why people are saying 3.5 is the downfall of firefox. Its the fastest version yet. If they were half as knowledgeable as they claim to be, they'd know that the new Tracemonkey javascript engine makes it load pages way faster than Firefox 3.0. Firefox 3.5 is definitely NOT as fast as Chrome or Safari in terms of pure speed, but the folks at Mozilla are definitely improving it, rather than making it more bloated.

    Part of the reason why the Gecko engine isn't as fast as others, like Webkit, is because its much more than a web rendering engine. It is also a UI software development toolkit. Gecko not only renders websites, but also the Firefox UI as well. There are a lot of new applications that use XUL and Gecko. Take songbird for instance. It is definitely a more complex engine and hence will take time for Mozilla to make it catch up to others. But its definitely getting there.

    @Aliman: At least Chung has some valid arguments. You're just showing your childish behavior. You're the one who needs to get off this blog.

  49. Imran
    August 2, 2009 at 2:06 pm

    very useful. Keep it up.

  50. mymashable
    August 2, 2009 at 1:14 pm

    Great info! already tried some of these things. Now let me try the new one's.

  51. Alex
    August 2, 2009 at 12:06 pm

    Thanks for this post, very useful. I am using FF3.5 day in, day out, be it for SEO or web development, something Opera or Safari don't do properly (yet). Until such time comes I will be sure using your guide :)

  52. Owen
    August 2, 2009 at 11:54 am

    The only problem I have with this article is the fact that it shouldn't have to be written....

    Opera 10 and Safari 4 are running at lightspeed compared to sleep-inducing Firefox these days....

    3.5 might spell the demise of Firefox - I'm sorry to say. When the Chrome comes out sometime later this year or next, people will realize that speed is the priority of all good browsers - not ridiculous functionality that you'll never (or rarely) use.

    • kiliya
      August 23, 2009 at 2:26 pm

      Owen, your comparisons are weak. You're on some strange ego trip about your operating system. 3.5 is faster than previous versions. Short of instant display what do you want? And as far as being sorry, why? Go hype your Mac somewhere else, like a Mac forum. You can all jerk each other off.

  53. Mr Smith
    August 2, 2009 at 8:53 am

    I know this will annoy people, but give Chrome a shot, if you don't really use Greasemonkey there is few reasons I can think of to stay with FF.

    • LeftHandedGuy
      August 2, 2009 at 9:40 am

      switch to Chrome.

      • Srinivas G
        August 2, 2009 at 11:04 am

        Yep!.....I'll switch to chrome when it gets "RSS Autodiscovery" support, ""**extensions**"" support and still manages to be quicker than Firefox!! ;)

  54. Srinivas G
    August 2, 2009 at 8:51 am

    Thanks a lot for putting all the tricks at one place! I already know the most of them,, and could get hold of the rest! Ignore the retards....that the best thing u can do to keep them away!! :)

  55. Aliman
    August 2, 2009 at 8:36 am

    Thanks for all the great tips! I appreciate your hard work on these. And as for the idiot named "Chung"--he really needs to change the first two letters of his nick ("Ch") to a capital "D" as it would fit his mentality better--I'll spell it out for this idiot Chung--his name should be DUNG! Chung, it is obvious your IQ is a number that is below "room temperature--someone call Chung's Mom and tell her he needs to be breast fed and get him off her computer.

  56. Phil
    August 2, 2009 at 7:10 am

    I have used Minefield the nightly build of firefox from FF2 which was very basic. I soon learn that it was the add-ons that slowed it down, so only install what you need.

  57. mistergoodbytes
    August 2, 2009 at 6:17 am

    Very helpful. Bumps the speed up noticeably. Thank you. Ignore the chuckleheads who don't appreciate your effort.

  58. Kaplang
    August 2, 2009 at 6:11 am

    I have no problem with using firefox, its IE that a totally hate and cannot use. Thanks for the useful post, keep them coming :)

  59. kevinn
    August 2, 2009 at 10:34 am

    Intel Mac optimized builds:

  60. commk
    August 2, 2009 at 4:43 am

    i guess it's a useful guide, but i'd like to see it's usefulness in effect with a "before and after" test. Nevertheless nice guide!

  61. chewtoy
    August 2, 2009 at 3:35 am

    Thanks for this! I've tweaked my about:config to death, and somehow I broke the internet. I actually switched to SRWIron because Firefox often crawled to a halt. The settings you recommended seem to have solved the issues! I was really starting to miss some of my extensions, and Chromium's support for scripts is hit and miss. Much obliged.

  62. Dr. H. - D. Claus
    August 2, 2009 at 2:08 am

    Good hint about the moving of the Cache. Keeps the primary SSD on my EeePC 901 from filling too fast. Thanks a lot!

  63. nukta77
    August 2, 2009 at 1:31 am

    Absolutely superb guide. Thx!

  64. Juarez P. A. Filho
    August 2, 2009 at 12:41 am

    I followed this recommendations and hope my FF get wings. +D Thanks to share!

  65. Brian
    August 2, 2009 at 12:36 am

    Ultimate guide to speeding up Google Chrome:

    1. Install
    2. Run

  66. Anterpreet Singh
    August 2, 2009 at 2:51 am

    Great tutorial, helpful. I have changed my most of the settings acc. to it, and for RSS i subscribe to all by google reader and then subscribe to my google reader feeds via live bookmarks :D

  67. Mahendra Palsule
    August 1, 2009 at 9:00 pm


    #P2 build is for Athlon XP, Duron 1.1 GHz+, Pentium III ,Celeron 500+ Processors

    #P3 build is for AMD Athlon 64, Sempron, Opteron processor family, Intel Pentium 4/D/M, Intel Xeon, Intel Atom, Intel Core processor family, and other modern CPU.

    As long as you have a fairly recent computer, you should use the P3 build.

    • Dennis (Web Overhauls)
      August 2, 2009 at 11:56 pm

      Thanks, Mahendra. I didn't know what the P1, P2, P3 files were either.

  68. Wallace
    August 1, 2009 at 8:34 pm

    oops, what a stunning Firefox tutorial.

  69. Phaoloo
    August 1, 2009 at 7:41 pm

    Wow, follow this guide you will make your browser a super firefox. Thanks for sharing this guideline.

  70. VoiceZ
    August 1, 2009 at 4:36 pm

    Oh btw did google pay u to write this post!?

  71. raptrex
    August 1, 2009 at 4:35 pm

    can you describe what p1, p2, and p3 builds are?

  72. VoiceZ
    August 1, 2009 at 4:33 pm

    All those raving about this post should giro, and if u don't fins it create one, with your intellect I guess it won't be that difficult, or would it? Duh!!

  73. Larry B.
    August 1, 2009 at 4:19 pm

    As a follow-up of my previous post, I just did some calculations and came up with the result that thanks to time-saving techniques, I "earn" an extra US$100 every month.

    If I didn't use these techniques, I'd earn US$100 less every month...

    Time is money ;)

  74. James NomadRip
    August 1, 2009 at 3:09 pm

    Thanks for this. I was having a major issue with 3.5 bogging hard for about a minute every time I typed anything into the address bar. One of those fixed that immediately, and it allows me to type or change web addresses in the address bar as it should, now.


  75. Larry B.
    August 1, 2009 at 3:03 pm

    I actually thought some of these tips were quite useful for me.

    I work as a translator and I spend most of my day online, so every single second that I can save is precious (when you add up all of those seconds).

    It's just like those simple tips like "press ALT+TAB to switch windows"... people may think it's stupid, but you actually save time and optimize your work thanks to tips like those. The less I have to use the mouse, the better. And the fastest my Firefox works, the better.

    To sum up, thanks for this info ;)

  76. Karl
    August 1, 2009 at 1:55 pm

    Wow, what a list of optimisation ideas for firefox 3.5! I can't wait to implement so
    e of these options on both my mac / pc setups. Thank you for this! :-)

    • chris
      August 4, 2009 at 9:09 am

      Be careful -- I tried these on my firefox/mac setup & it fraked it all up. Pages take minutes to load now (over FIOS 25). The 'tweak' addon mentioned seemed to be the biggest Really Bad Idea, but working backwards, still haven't gotten back to normal (let alone faster).

  77. Chung
    August 1, 2009 at 1:52 pm

    come on. this is so useless. i am running ff3.5 on an intel atom netbook with >10 extensions and i have no problems with it. of course, it needs its time to start. but then it runs fluently. nor does it eat more than 150 mb ram. by the way, after it's been started, it runs the whole day. i dont need it to be start quickly as long as it reacts fast at the afterward user inputs - and it DOES do that.

    this senseless and pseudo tips from are making me think of unsubscribing from your feed.

    removing "unused search engines" and closing the download window right after the downloads are finished, are drawing tears on my eyes. what in the world those tips good for? nothing. nada. senseless. jsut showing the quality of your miserable blog. goodbye.

    • Heung Lee
      August 2, 2009 at 4:17 am

      Chung, your comments have no value here, all you're doing is criticising for the sake of it. If you don't find these of any value, move on and don't bitch about it. The original author is just trying to help people out, give the guy a break. Notice how everyone else seems happy with the time and effort the author made? Then it's just you... so you can save yourself some time and never have to bother coming back here and irritating us with YOUR senseless drivel again.

      • Tom Sidney
        August 3, 2009 at 12:29 pm

        Well said Hueng Lee.

    • vasiauvi
      August 2, 2009 at 5:37 am

      Thank's for this post!
      Some of this tips I've had already in my Firefox.
      And with a lot of add-ons Firefox is very very very slow.
      After wards i've installed Swiftfox and seen a BIG difference!
      An now, reading this post, I had implemented other tips that is helping me!
      Those, criticism is good, but saying that the blog is miserable shows that you are sick with your head!

    • Brian
      August 2, 2009 at 6:09 am

      Wow Chung! How long have you been holding this anger in? You are incorrect about there not being any benefit to removing useless search engines, and also about closing the download window. Granted that the effects of these two particular tweaks are minor, nonetheless, they are a beneficial tweak in the totality of all that was presented. Truthfully though, the very best way to speed up FF is to dump it and get Google Chrome. You should try Xanax or maybe even masturbating. Either will help relieve the immense pressure you obviously feel

      • Greg
        January 8, 2010 at 9:44 am

        While Chrome is very fast at rendering pages, for some people it lacks a lot of the tools firefox has, which allow far more complex tasks to be easily completed. (for example, if I want to download 1500 images from a site in Chrome I prepare my fingers for lots of clicking. In Firefox I can use DownthemAll and have them all going after 4 clicks. Basically, what I mean is that for many people "dump it" is not a viable solution to Firefox's (minor) speed issues.

    • Quantified
      August 2, 2009 at 5:41 pm

      I agree with Chung! Most of this info is like a traditional story being passed along like Christmas. Is it still relevant to blindly follow along? Should I really instrument some arbitrary values to add perceived or is it actual snappyness? This FF 3.5 the performance tweaks from 3.whatever before don't apply.

      About: Network.http.max-persistent-connections-per-server
      MozillaZine : If you are not using a proxy and experience problems not being able to download multiple files, you can raise this value. It is, however, considered poor etiquette to make too many connections to a server and may lead to you being banned from that server. Anything above 10 is excessive.

      I could alter my routers mtu settings too but, why?

      Thanks for the tip about changing the mailto as Evolution in gnome is the default and Evolution is not relevant to my needs.

      My point is results are useless unless you can measure them.

    • mchlbk
      August 3, 2009 at 2:35 am

      Come on guys, play nice.

    • Aiden Macleod
      May 24, 2015 at 7:18 pm

      Good riddance ya bleeding womb troll!

    • Aiden Macleod
      May 24, 2015 at 7:23 pm

      It's apparent that Chung is retarded. Plainly, as you can tell by his use of grammar, he not went to school all of way, so he thinks everyone ELSE is "stoopid".

  78. Decio
    August 1, 2009 at 5:10 pm

    How about cleaning up Firefox internal sqlite database: