A minor annoyance that I have noticed while using FF in Ubuntu 10.10.
using FF In XP, when you single-left-click on the address bar or the search bar, whatever is already on that area gets "selected/marked" and you can start typing on the bar straightaway. Not in Ubuntu: single click on those areas does nothing: you have to click and drag the mouse across the whole address/search bar (which doesn't go smoothly either), and mark the text, delete the marked text, and THEN start typing...I don't know why this is, but it's starting to bug me a bit...
EDIT: fixed it by doing this...wish there was an option to do this for the search bar, too...
Open Firefox
type:
about:config
in the address bar and click Go (or press Enter/Return)
In the filter box type:
click
From the filtered list you need to work with:
browser.urlbar.clickSelectsAll
Right click on this entry and select "Toggle" from the drop down menu, to change the value to "true"