FF35 keeps flashing & changing FF windows, often shows as "not responding" and it fairly frequently crashes.
This is a problem that has steadily got worse over the last few months despite various FF upgrades. I have thought of uninstalling FF & doing a new install, but I'm concerned about losing my history & bookmarks and also losing the addons that I have installed [how do I find what they are, same Q with history & bookmarks]. I'm running Win 7 on an HP G61 laptop with 4 Gig memory
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Firefox comes in two or more folders on all computers. They are;
Maintenance: (Programs Folder) <Windows Only> Firefox itself: (Programs Folder) And one folder in the profile of each user on the computer.
If you remove the Firefox folder, the user folders would not be affected.
Let’s do a full clean re-install; Download Firefox For All languages And Systems {web link} Save the file. Then Close Firefox.
Using your file browser, open the Programs Folder on your computer.
Windows: C:\Program Files
C:\Program Files (x86)
Mac: Open the "Applications" folder.
https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac
Linux: Check your user manual.
If you installed Firefox with the distro-based package manager,
you should use the same way to uninstall it - see Install Firefox on Linux.
If you downloaded and installed the binary package
from the Firefox download page, simply remove the folder
Firefox in your home directory.
Do Not remove the profiles folder.
Look for, and rename any Mozilla or Firefox program folders by adding .old to them. Do not rename the Mozilla Thunderbird folder.
After rebooting the computer, run a registry scanner. Then run the installer. If all goes well, remove the OLD folders when you are done.
If there is a problem, start your Computer in safe mode and try again.