Why I get "Java Script Application" Error: Div is null every time I open YouTube video?
Every time I click on ANY YouTube video, I get a window with the message "Java Script Application Error: Div is null" and I have to click OK. Then the exact same message window opens again and I have to click OK again before I can do anything else. The video will start but unless I click OK, I have no control over anything. It's very annoying. What is causing this and what can I do to fix this issue?
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hello, can you try to replicate this behaviour when you launch firefox in safe mode once? if not, maybe an addon is interfering here...
Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems
It does not occur in safe mode.However, I disabled all my add-ons and tried (after launching Firefox normally again) and the problem still occurs.
which addons do you have installed? probably also try removing the ones that directly change the behaviour or add functionality to youtube.com...
Yes I removed "Youtube downloader" then no more pop up windows. Do you know which YouTube downloader works without this kind of issues?
you could try https://addons.mozilla.org/firefox/addon/video-downloadhelper/ instead...