Firefox completely locks up and can't click on pages, switch tabs or open menus. FF 65.0.2 64bit, Win10 Pro 10.0.17763 build 17763
This happens while browsing different pages and doesn't seem related to a single web page, around 10 tabs open none using much resources. Computer CPU usage and ram usage are at under 50%.
I only have a single extension, lastpass, which i disabled and still get the same results.
Solution choisie
i was able to find the issue being a webpage that i just typically had open.
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Do you get the problem if you try using only one tab/window?
Start Firefox in Safe Mode {web link}
A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?
https://support.mozilla.org/kb/Firefox+is+already+running+but+is+not+responding
https://support.mozilla.org/en-US/kb/firefox-slow-how-make-it-faster
https://support.mozilla.org/en-US/kb/firefox-uses-too-many-cpu-resources-how-fix
https://support.mozilla.org/en-US/kb/firefox-uses-too-much-memory-ram
https://support.mozilla.org/en-US/kb/firefox-hangs-or-not-responding
https://support.mozilla.org/en-US/kb/firefox-takes-long-time-start-up
Solution choisie
i was able to find the issue being a webpage that i just typically had open.
I do not understand what you mean.