Firefox

Contents
      1. My Favourite Extensions
        1. For Web Development
        2. For Extension Development
      2. about:config
      3. Other

My Favourite Extensions

For Web Development

For Extension Development

about:config

Make backspace go to the last visited page
 browser.backspace_action=0

Click on location bar selects all
 browser.urlbar.clickSelectsAll=true

Show only location bar suggestions with matching start of word
 browser.urlbar.matchBehavior=2

Run animated GIF files only once
 image.animation_mode=once
the value "none" turns animations off; the default is "normal". This unfortunately doesn't apply to favicons.

Allow middle click paste to open URL
 middlemouse.contentLoadURL;true

Disable prefeching
 network.prefetch-next;false

Identical values for
 places.frecency.(...)
BucketWeight disable preferece for recently visited sites in location bar suggestions.
 places.frecency.bookmarkVisitBonus=0 
and
 places.frecency.unvisitedBookmarkBonus=0 
disables preference for bookmarks.

To prevent Firefox from entering Offline Mode on startup, make it ignore NetworkManager:
 toolkit.networkmanager.disable=true

Don't open new windows or tabs unless explicitly wanted by the user: browser.link.open_newwindow=1 To Include customized Javascript windows:
 browser.link.open_newwindow.restriction=0

NoScript: Don't show release notes after each update
 noscript.firstRunRedirection=false

Position all new tabs at the end of the tab list (instead of next to the tab containing the link):
 browser.tabs.insertRelatedAfterCurrent=false

Other

Open new Firefox session with specific profile, locale and open JS console:
 firefox -no-remote -P dev -jsconsole -UILocale en-US
browser.xul
Tidy up, and thus speed up, the database:
 find ~/.mozilla/firefox/ -type f -name '*.sqlite' -exec sqlite3 {} 'VACUUM;' ;

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