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Firefox doesn't support HTML5 while other Browsers do. Latest Ubuntu 20.04. LTS

So the problem is that Firefox doesn't play any HTML5 content. Weirdly except for Youtube. Youtube works just fine. But every other Website shows errors. Even songsterr.c… (read more)

So the problem is that Firefox doesn't play any HTML5 content. Weirdly except for Youtube. Youtube works just fine. But every other Website shows errors. Even songsterr.com. I'm using latest Firefox 76.0.1 on a recent Ubuntu 20. 04 LTS installation. Usual troubleshooting like updates doesnt work because "sudo apt-get upgrade" doesn't find any updates. I tried the same websites in the latest version of Chromium and they work perfectly fine. I couldn't find a mistake in the firefox settings or something so I'm confused. Disabling Plugins didn't change anything and turning of tracking protection didn't either. What is the Problem here and how can I solve it?

Asked by wauwufflp 2 years ago

Answered by cor-el 2 years ago

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Prevent new window from hiding addons in toolbar

Recently, when a popup window appears, the toolbar doesn't have buttons for any of my addons. In about:config, I'd intentionally set dom.disable_window_open_feature.toolb… (read more)

Recently, when a popup window appears, the toolbar doesn't have buttons for any of my addons.

In about:config, I'd intentionally set dom.disable_window_open_feature.toolbar to true (following the solution provided in: question 1206512).

Previously, this was successful in ensuring that popup windows got the full toolbar, but now it has stopped working.

I'm not sure exactly which release this started with.

Steps to reproduce:

1) Set dom.disable_window_open_feature.toolbar to true.

2) Visit https://jeffersonscher.com/res/popit.html and follow the third link.

3) The window that pops up has no toolbar icons for the installed extensions.

Asked by pg_78 2 years ago

Answered by jscher2000 - Support Volunteer 2 years ago