Firefox optimization and plugins

Get firefox to use less memory, expecially for those who always have lots of tabs open at once.

about:config

network.prefetch-next

set to "false"

Fx .6 and up: Firefox has this wacky little feature that downloads pages from links it thinks you may click on pages you view, like the top result on a page of Google results. This means you use up bandwidth and CPU cycles and store history for web pages you may not have ever viewed. Creepy, eh? To stop that madness, set the network.prefetch-next key to false.

browser.cache.disk.capacity

set to "5000"

Modified Value: Depends on your system’s total memory.
According to Computerworld: For RAM sizes between 512BM and 1GB, start with 15000. For RAM sizes between 128MB and 512M, try 5000.

browser.cache.memory.capacity

set to "4096"

if you have:
1. 256MB RAM - Enter "4096".
2. 512MB RAM - Enter "8192"

config.trim_on_minimize

set to "true"

clears firefox menory on minimize

browser.sessionhistory.max_total_viewers

set to "0"

Pages that were recently visited are stored in memory in such a way that they don't have to be re-parsed (this is different from the cache). This improves performance when pressing Back and Forward.
This preference limits the maximum number of pages stored in memory.
-1 automatic based on memory
0 none
1 one
etc...
One page will on average take 4MB of memory.

Click Privacy. Un-check the "Remember What I've downloaded" check box.

Flash Block

(see Useful Plugins)

Tab Mix Plus (if installed)

(see Useful Plugins)

Convenience:

All versions: For those of you that have a Mac, you may run into this irritating problem from time to time: When you try to drag a bookmark into one of your bookmark toolbar folders, the tool tip gets in the way and prevents the drop from working. Argh, matey! Of course, you already know what all the buttons on your browser chrome do, so the tool tips aren’t necessary. To turn them off, set the browser.chrome.toolbar_tips key value to false. As and added bonus, it’ll solve your Mac’s bookmark drag and drop problem.
Key: browser.chrome.toolbar_tips

Prevent web sites from disabling the context menu with Javascript (in Firefox)

Some sites prevent you from right-clicking on the page to show the context menu.

To disable such attempts, go to Tools > Options... (Firefox > Preferences... on Mac OS X, and Edit > Preferences... on Linux), click the Content section, and then click the Advanced... button next to Enable JavaScript.
In the Advanced JavaScript Settings window, uncheck Disable or replace context menus and click OK.

To open two firefox browsers at once:

also specify different profiles for each with the -p option: -p profile_name -no-remote

Useful Plugins:

"ScrapBook is a Firefox extension, which helps you to save Web pages and manage the collection. Key features are lightness, speed, accuracy and multi-language support"

Tab Mix Plus
Turn off undo close tab (or turn the number of undo's down)
Restore your browsing session - with form entries intact
No close tab buttons (x's)
No new tab button

Firefox optimization and plug-ins

Memory Fixes:

Convenience:

Prevent web sites from disabling the context menu with Javascript (in Firefox)

To open two firefox browsers at once:

Useful Plugins: