User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.5) Gecko/20070713 Firefox/2.0.0.5 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.5) Gecko/20070713 Firefox/2.0.0.5 There is no "help" in the tool bar, except in Safe Mode. The page size is reduced at the bottom with a space about 1/8 of the total size. There is a "^" present in the space. On clicking on the "Bookmarks" the drop down feature does not work until one goes to the "Organize Bookmarks", quit out and then click on bookmarks again. Only seemed to work correctly in "Safe Mode". I solved the problem by uninstalling "Wikipedia" . Once this was done, everything returned to normal. I then had to reinstall Google Toolbar again. Not sure why this incompatibility suddenly arose. Reproducible: Always Steps to Reproduce: 1.Install Wikipedia 2.Re-open Firefox 3.Go to above mentioned problem areas. Actual Results: All explained above Expected Results: Worked as it used to. Nothing was downloaded to change what was previously working together. I had been running Wikipedia with Firefox, and there was no problem. Just occurred out of the blue. Even rolled back my Windows to a restore point before the problem occured, but did not solve the problem. Only solved once I uninstalled Wikipedia. Now working correctly....without Wikipedia.

Similar, but only the space below the page is the same. No mention was made of the Wikipedia being at fault. Also other symptoms not mentioned

All that matters in bugzilla is the end result. Extension authors are responsible for maintaining compatibility with Firefox.