1. Go to any web page 2. Press back button before tool tip shows 3. Leave mouse over back button 4. After previous page displays, the "You are on-line" tooltip appears for the back button.
This is a dupe of bug 81683 (sometimes after pressing toolbar buttons I see a cropped tooltip "go offline" in the upper left) This was fixed just after 0.9.3 came out, so the fix will not be available on a milestone release until 0.9.4, but you are welcome to try a nightly build to see the results. http://ftp.mozilla.org/pub/mozilla/nightly/latest/ Reporter, also, please read the bug reporting guidelines at http://www.mozilla.org/quality/bug-writing-guidelines.html . When you report bugs that follow those guidelines, it makes it so much easier for us to figure out the cause of your bug and fix it. Thank you for helping test Mozilla! :) *** This bug has been marked as a duplicate of 81683 ***