Apparently it’s now officially called Firefox 2 and not two-point-o (2.0), so I’ve dropped the .0 from the title. :P

I usually use the shortcut keys ALT+I, ALT+B rather frequently at a forum I visit to get highlighted text in the post box to be italicised or bolded, but in Firefox 2, this shortcut keys no longer work by default. You now have to add the SHIFT key into the mix, so it goes ALT+SHIFT+I instead. If you don’t want to use the SHIFT key, you can edit two values in about:config (like for the close tab button previously):

Change:
ui.key.chromeAccess to 5
ui.key.contentAccess to 4

Taken from MozillaZine forum.

As for other about:config tweaks, head over to this page and for other Firefox tweaks, check this guide out. ;)

One of the more obvious user interface changes in this version of Firefox is the position of the close button for tabs. Practically all other web browsers with tabs have tab closing buttons on each tab as opposed to Firefox’s choice of having it at the extreme right of the tab row up until now. With version 2.0, the default close tab button position is now on each individual tab.

This is probably a good decision in a way, but after such a long time of using Firefox, I’ve been too accustomed to the close button being there and would rather not have that change (I use the scroll button to close tabs nowadays, but selectively closing multiple tabs with the ‘x’ at the end is pretty useful). Fortunately there’s a setting which can be easily changed to accommodate the behaviour you want.

Here are the steps to have the close button back at same position as pre-1.5 days:

1. Type ‘about:config’ in the address bar.
2. In the filter textbox that appears below, enter ‘browser.tabs.closeButtons’.
3. Double click on the browser.tabs.closeButtons preference, and a message box should appear.
4. Change the value to ’3′ and click OK.

And you’re back with the close button at the same position as before the latest upgrade! You can easily revert to the default Firefox 2.0 behaviour by changing the value back to 1.

Default:

After change of value:

Here are some other values you could use for that preference:

• 0 – Display a close button on the active tab only
• 1 – Display close buttons on all tabs (Default)
• 2 – Don’t display any close buttons
• 3 – Display a single close button at the end of the tab strip (Firefox 1.x behavior)

browser.tabs.closeButtons values and explanations taken from MozillaZine Knowledge Base.