I keep getting the same message: A script on this page may be busy, or it may have stopped responding

Question

Since a day or two I have been getting the same error message: "A script on this page may be busy, or it may have stopped responding. You can stop the script now, open the script in the debugger, or let the script continue."
I am not an IT expert, however I've read similar posts online and tried lots of the suggested steps such as:
- deleting browsing history and cookies
- resetting Mozilla to factory settings
- uninstalling and re-installing Mozilla
Unfortunately, the problem is still the same. What can I do? I work from home and need the internet to work 100%.
By the way, the browsing works fine in other browsers, just not Mozilla.
Thanks

Answer 1

You can try to disable hardware acceleration in Firefox.
*Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"
You need to close and restart Firefox after toggling this setting.
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
*https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration
Create a new profile as a test to check if your current profile is causing the problem.
See "Creating a profile":
*https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues
If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox
Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen) as a test.
*http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/