FIrefox becomes slow and/or unresponsive on YouTube and Twitter
I am running an up-to-date version of Firefox on Windows 10.
When viewing YouTube, the browser becomes slow and/or unresponsive. I am unable to scroll, stop the video once it starts playing, close the tab, or switch to another tab.
On Twitter, I continually receive unresponsive script errors that also cause the browser to momentarily freeze.
I have never had these problem until about 3 months ago. I've tried a clean install, refreshing Firefox, and other support solutions I could find.
Krejt Përgjigjet (3)
Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options) key, and then starting Firefox.
A small dialog should appear. Click Start In Safe Mode (not Refresh).
Is the problem still there?
https://support.mozilla.org/en-US/kb/websites-look-wrong-or-appear-differently
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-hangs-or-not-responding
https://support.mozilla.org/kb/Firefox+is+already+running+but+is+not+responding
Yes. I double checked my add-on page, noticed some had expired or were no longer supported, and removed them. So far, so good.
Not sure why this didn't work back in March.
Some add-ons may have been replaced by others.