Right so my Firefox has been crashing alot when going to pages with Google Ads on. On every page infact. Well, here's a fix.

Open up your Firefox and type in the address bar:

Now, a long list of settings will come up. In the search bar, type this:

After that, the setting will appear and if it's set to true. Double click it, close Firefox and start it back up again. That should have fixed the problem.

Ref: Google Groups