Some of the shortcut keys for Firefox on Ubuntu are different to those on Windows. The most pertinent one for me is that the <backspace> key as a shortcut for clicking the “Back” button has been disabled. This is easily fixed in about:config by changing the value of
browser.backspace_action to 0.
CTRL+SHIFT+arrow doesn’t select chunks of text in the Firefox location bar. It just selects all of it. I’m very used to chopping and changing URLs by hitting ALT+D followed by some keyboard selection goodness. No more apparently. Want to take off the “/blog” from a URL? That’s ALT+D and backspace five times. Hope you can count really quickly because sometimes my fingers move much faster than the location bar updates.