Random Firefox Tweaks
The following options have to be changed or added in about:config. Those tweaks can of course be achieved through extensions, but by setting them directly you can abandon some extensions and hopefully conserve some memory.
In order to open a bookmark-folder with mid-click in tabs without overwriting the current tabs change:
browser.tabs.loadFolderAndReplace=false
To remove the close buttons on the tabs (they still can be closed by mid-clicking on them):
browser.tabs.closeButtons=2
Enable the spellchecker for inputfields and textareas (default is textareas only):
layout.spellcheckDefault=2
To override the useragent string:
general.useragent.override=foobrowser
And the last one really made my day: Open lastfm://-links directly in amarok:
network.protocol-handler.app.lastfm=amarok network.protocol-handler.external.lastfm=true
BTW: Shouldn’t firef*cough* iceweasel open the composer of your mailclient when clicking on mailto-links?