Drop-down menus will not open fully (to show all the text) - nor can I select anything
Since upgrading to Firefox 36.0.4 drop-down menus will not open sufficiently to display all the text inside. Also -- when I try to select text ... for instance, when I try to choose one of my bank accounts to transfer funds to another of my accounts nothing whatsoever happens. In other words, clicking with my mouse does nothing.
I have similar problems in Firefox preferences. I can select a menu (general, tabs, search, content etc) and it opens, but not far enough to see inside.
I had installed a plug-in (Theme Font and Size Changer) and wondered if this might be causing the problem, but I disabled it and there is no improvement.
Wšykne wótegrona (2)
You may have a corrupt xulstore.json file. https://support.mozilla.org/en-US/kb/changes-toolbars-and-window-sizes-are-not-saved
Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.
- Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
- Do NOT click the Reset button on the Safe Mode start window