Tag Archives: Firefox

Firefox Performance Tweaks

Over time I have been collecting various Firefox tweaks… this is my collection of performance tweaks that i used to tame down Firefox 2.x on Mac. These work on all platforms but they really helped with the mac version too :)

Firefox Excessive Memory Usage

1. Within Firefox, enter “about:config” (minus the quotation marks) in the address bar

2. Scroll down to the entry “browser.sessionhistory.max_total_viewers” and double-click it.

3. In “Enter integer value” field, type..

* “0” to disable the cache

* “1” through “8” to set the maximum cache as 1 through 8 previously-viewed pages

* “-1” to return the cache to its default

Max Total Viewers

To improve performance when navigating (studies show that 39% of all page navigations are renavigations to pages visited < 10 pages ago, usually using the back button), Firefox 1.5 implements a Back-Forward cache that retains the rendered document for the last few session history entries. This can be a lot of data. It’s a trade-off. What you get out of it is faster performance as you navigate the web.

For those who remain concerned, here’s how the feature works. Firefox has a preference browser.sessionhistory.max_total_viewers which by default is set to -1. When set to this value, Firefox calculates the amount of memory in the system, according to this breakdown:

RAM Number of Cached Pages

32MB 0

64MB 1

128MB 2

256MB 3

512MB 5

1GB 8

2GB 8

4GB 8

(reference: nsSHistory.cpp)

No more than 8 pages are ever cached in this fashion, by default. If you set this preference to another value, e.g. 25, 25 pages will be cached. You can set it to 0 to disable the feature, but your page load performance will suffer.

Continue reading Firefox Performance Tweaks

Browser Stress Test: Featuring Firefox 3.0 Beta 1

With the release of the new Firefox 3.0 Beta 1 it was time again for my usual 30 tab browser stress test. My test consists of loading the same 30 tabs in all of the browsers tested.
In this test: Opera 9.24, Netscape Navigator (Firefox codebase), Safari 3.0.4, and Firefox 3.0 Beta 1. In previous tests Navigator 9.x beat Firefox 2.x but now the new Firefox 3.0 Beta 1 seems to beat Navigator 9. The surprising part is how badly Opera did… it seems it didn’t even attempt to recover at all. For the most part Safari 3 is quite effecient but the new Firefox 3 beta has improved largely improved over Firefox 2.0 on mac. Note… these results may vary.

30 Tab Load test(Lower memory usage is better)

Check out the Firefox 3.0 Beta 1 @ http://en-us.www.mozilla.com/en-US/firefox/3.0b1/releasenotes/

AM-DeadLink: Free Bookmarks/Favorites Cleanup Tool

When I moved to using Safari as my default browser I found my bookmarks it had imported were in major need of cleanup… tons of duplicates,dead URL, etc. I have been doing them manually for the last day or so… or at least until i found AM-DeadLink.

AM-DeadLink detects dead links and duplicates in browser bookmarks and text files. If a bookmark has become unavailable you can verify and delete it permanently. Additionally you can download Favicons for all your Favorites and Bookmarks.


The best part is: AM-DeadLink is freeware!

Check out AM-DeadLink