Could someone please try to open the link and share the result

I get "Sorry about that, but we can’t show files that are this big right now" but if I click "View raw" it loads without issues and the process does not persist after closing the tab.

Does it still happen in a new profile? An easy way to test a new profile is to install Developer Edition and see if it happens there or refresh your existing profile.

It seems the problem happens only if you are logged in

I tried to delete all github.com data and cookies, opened the link and it worked. Then I logged back in and got the hung tab again

If you open the link while logged in, the contents of the file are displayed. This file contains 1.8 megabytes of heavily obfuscated code in one line. This explains why the tab hangs.

I think this topic can be closed, but it should be noted that this problem does not occur in google chrome

Does this 'raw' link work ?

• https://github.com/besuper/TwitchNoSub/raw/master/src/amazon-ivs-worker.min.js

Does this 'raw' link work ?

• https://github.com/besuper/TwitchNoSub/raw/master/src/amazon-ivs-worker.min.js

Yes it's working

Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or if userChrome.css/userContent.css is causing the problem.

• switch to the Default System theme: "3-bar" menu button or Tools -> Add-ons -> Themes
• do NOT click the "Refresh Firefox" button on the Troubleshoot Mode start window

• https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

Running the browser in safe mode gives the same result

• I already use a standard theme
• Didn't click