

Firefox 3 one of the maximum downloaded open source browser which has set a Guinness world record. Their were Over 8,000,000 downloads in 24 hours!. Along with Firefox 3 Spreadfirefox also got new cool look.
Firefox 3 about:config file is the core configuration file of Firefox. By editing about:config file we can get amazing hacks for Firefox 3. Firefox allows the users to change many preferences in the about:config file so it’s totally ethical to do it.Here is list of 21 Firefox 3 hacks & tweaks.
To get the Firefox 3 configuration file type “about:config” at address bar.
Firefox 3 about:config hacks
Here is List of about:config hacks for Firefox 3
1) Disable Extension Compatibility Checks
extensions.checkCompatibility = False
extensions.checkUpdateSecurity = False
2) Location Bar (Set number Auto Complete URL at Address Bar)
This is a good hack to trim down that huge auto-complete list on your URL bar. By default it displays maximum 12 URL
browser.urlbar.maxRichResults = #
Enter Number at # (3,10,12 etc)
3) Stop Displaying Website Icon (Favicon) in Address bar & On Tab
browser.chrome.site_icons = False
4) Disable Prefetch (Helpful for frequent Google searcher, low-speed internet connection or low RAM)
network.prefetch-next = False
5) Extend Spell check to forms
layout.spellcheckDefault = 2
Change Value from 1 to 2
6) Disable Blinking Text
browser.blink_allowed = False
7) Speed Tweaks
network.http.pipelining false to true
network.http.pipelining.maxrequests 30 to 8
network.http.max-connections 30 to 96
network.http.max-connections-per-server 15 to 32
network.http.max-persistent-connections-per-server 6 to 8
network.http.pipelining.ssl false to true
network.http.proxy.pipelining false to true
8 ) Disable Annoying Browser Behavior
dom.disable_window_open_feature.menubar
dom.disable_window_move_resize
dom.disable_window_open_feature.titlebar
dom.disable_window_open_feature.toolbar
Set all of above to value False
9) Remove Tab Close Button from all Tab and set A single Close Button at Right
Remove Tab Close Button
Remove Tab Close Button
browser.tabs.closeButtons = 3
Single Close Button to control all Firefox Opened Tabs. (value should be 3 and not 2 Thanks Andreas )
10) Disabler Browser Toolbar Tip
browser.chrome.toolbar_tips = False
11) Show More Tabs on Single Firefox Window before Scrolling
browser.tabs.tabMinWidth = 75
Setting lesser value with reduce Tab width
remaining hack very soon
keep waiting