FireFox Lockups

Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

Also:

https://support.mozilla.org/en-US/kb/how-to-set-the-home-page

Type about:config<enter> in the address bar.
If a warning screen comes up, press the I Accept the Risk button.
At the top of the screen is a search bar. Type browser.startup.homepage

What is the value?
Right-click and select Reset to restore its default value; about:home

Ok starting in safe mode I no longer have the lockup issues

Home page is set to about:home

How do I fix it so I don’t have to start in safe mode

Have you tried restarting Firefox normally? Is the problem still there?

Issue still exists when starting Normally

It could be the work of one of your add-ons, or it could be Hardware Acceleration.
How to disable Hardware Acceleration {web link}

Type about:addons<enter> in the address bar to open your Add-ons Manager.
Hot key; <Control> (Mac=<Command>) <Shift> A)

In the Add-ons Manager, on the left, select Extensions. Disable a few add-ons, then Restart Firefox.

Some added toolbar and anti-virus add-ons are known to cause Firefox issues. Disable All Of them.

If the problem continues, disable some more (restarting FF). Continue until the problem is gone. After, you know what group is causing the issue. Re-enable the last group ONE AT A TIME (restarting FF) until the problem returns.

Once you think you found the problem, disable that and re-enable all the others, then restart again.
Let us know who the suspect is, detective.

I am glad to hear that your problem has been resolved. If you haven't already, please select the answer that solves the problem. This will help other users with similar problems find the solution.

Thank you for contacting Mozilla Support.