Firefox Support Forum

# My problem

When i go to some site with video (for example https://www.openproject.org/ ) i have the following message : "To play video, you may need to install the required video codecs".

# Spec

I run Firefox Beta in Fedora, it's installed in /opt/ folder. I have the "normal" version of firefox too and the video works well.

# Some other infos

The video seem to be a mp4 video and i have the following package installed in my fedora GStreamer Multimedia Codecs (Multimedia plauback for APE, AVI, DV, FLAC, FLX, Flash, MKV, MP4, Speex, VP8, VP9 and WAV).

Why can a stupid failing script on a web-page, or even intentionally so programmed script disable the copy (and sometimes paste) functionality?

How can this be disabled/fixed?

One highlights a text (any text) on some web sites, Edit menu allows Copy, context menu allows Copy, one hits Copy, nothing happens. It's not even a page where someone wanted to "copy protect" some information.

Copy and Paste should work just as advertised since those were invented, how hard can it be to get that right? Even stupid Notepad never fails at it. And no, I don't care what the idiot who programmed a page though would be/should be best for me, I want Copy to be copy, Paste to be paste. This used to work in "original" Firefoxes even when page developers wanted to make it not work.

And yes, while on a given page Copy fails miserably, at the same time in other pages it works.

After Firefox updated, I can no longer access www.apple.com. This is the error I get now:

Blocked by X-Frame-Options Policy

An error occurred during a connection to idmsa.apple.com.

Firefox prevented this page from loading in this context because the page has an X-Frame-Options policy that disallows it.

Can anyone tell me how to fix this issue as soon as possible. Thank You.

I have a question regarding PWA support on Firefox desktop. I am not sure how to frame this correctly, but I hope I am able to list the problem statement.

Basically, I plan to migrate my existing mobile and desktop website to single PWA based responsive website. Right now, I have mobile website which is a PWA, and a desktop website. Goal is to have a single PWA based responsive website for both mobile and desktop platform. However, I want to make sure the proposed website will work with Firefox desktop. From what I could find Firefox doesn't support option to install PWA as an app with it's own shortcut as it is possible in Chrome. But I want to make sure it supports rest of the features of PWA, and website still works correctly in terms of UI and experience as in case when it is accessed from Chrome browser.

Appreciate a response on this. In case you require more clarity on the problem statement, do let me know.

Dark Mode used to work beautifully in Firefox. Today it stopped working. I can choose Dark Mode in the settings page, and the settings page itself then uses Dark Mode. But Dark Mode does not work in any of the other pages, only the settings page. I think it must be a flaw in an update that was installed automatically today. (September 7, 2021)

Is there a way to uninstall this update and go back to the previous version. Dark Mode used to work beautifully and Firefox was my favorite browser. Can someone help? Thanks.

With Firefox 91, I can no longer disable the hideous Proton changes to tabs. Separating tabs from their content is a really poor user interface decision. It makes it harder to tell which tab is the current tab. With Proton, the active tab is slightly brighter than the inactive tabs. For older folks and color blind folks, this makes it all but impossible to to tell which tab is active.

If you won't come to your senses and revert this bad user interface decision, then at least add an official option to disable it and go back to the old tab style that other browsers use. If you won't do that, then I will just have to use a different browser. Which makes me very sad, because aside from your bad sense in user interface design, I loved Firefox.

How can I permanently force firefox's automatic updates to be turned off? Which guy modified the original design for the new version of Firefox bookmarks? Is there something wrong with that man's brain? Is the spacing of the new bookmark item too large to read? It's very uncomfortable.

Chrome has a really fantastic feature called "Tab Groups" - it's pretty self explanatory but it basically allows you to quickly group related sets of tabs.

This is an incredibly useful feature but it seems Firefox hasn't got anything like it.

I've tried a few of the third party add-ons such as Tree-Style-Tabs but they're all over-complicated, take up too much screen real estate or change the way tabs operate.

Is adding simple Tab Grouping functionality on the Firefox roadmap?

If not - has anyone found any good add-ons to replicate the Chrome functionality?

FFox 92 update today. Menu spacing went to double. No shock there. Found the CSS code below for UserChrome.css and set it up.

EX.

menupopup > menuitem, menupopup > menu {
  padding-block: 4px !important;
}
:root {
  --arrowpanel-menuitem-padding: 4px 8px !important;
}

EX:

menupopup > menuitem, menupopup > menu {
  padding-block: 0px !important;
}
:root {
  --arrowpanel-menuitem-padding: 0px 0px !important;
}

But, it doesn't get any smaller than the above 4/8px set up. Bug? Perhaps there's another CSS setting to be tweaked for V 92? I do not have any other CSS for these items elsewhere in my UserChrome file.

Hello,

I am trying to download Firefox source code. I tried the simplest option offered to me : https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Using_the_VM But the link to the Virtual Machine does not work. Do you know if the site will be back soon or will I have to search for another website offering this VM ?

Sorry for my bad english. I hope my question was clear

Clement

Why am I now having Bing show up as my default search engine when opening Firefox? I don't want Bing but can't find any way to remove it. My settings are such that Yahoo should show upon opening the browser and Google is set as my default search engine. I've uninstalled, reinstalled, check settings, etc. but I still get the damn Bing showing up as my home page and search engine. Any help would be appreciated.

It appears that Firefox 87.0b3 version has removed the Library - Pocket List menu item. Yet, through the about:config options, has retained the ability to activate the 'Save to Pocket' address bar icon.

This makes no sense as there is now no option to have a 'Pocket List' item selection. At least I couldn't find an option for this. That is without adding another extension.

Having the 'Save' option without the 'List' option is counter intuitive.

The Library-->Pocket List Menu item should be restored.

Thanks.

Hello,

Does Firefox support Office 365 online? I opened a Word document on Dropbox website and I got a message that office is not supported in this web browser. My computer has Windows 10 OS and I used Mozilla Firefox Developer as well as Mozilla Firefox. A colleague of mine has the same issue while using macOS Mojave 10.14.6 and Mozilla Firefox.

BTW I have Dark Reader plug-in enabled in my browser, that's why the picture is in reversed colours. It doesn't affect the problem described.

Thanks.

Every day I get a Firefox popup that says, "Firefox cannot download the latest version. Download the latest version and we will help you install it". Sometimes the popup appears immediately after I open my browesr, and sometimes it appears after I've been using the browser for several hours.

I've been doing the daily download and install, but I want to know what's causing this. I'm using a Late 2015 21.5" iMac running macOS Catalina Version 10.15.7. Firefox is Version 82.0b4, set as default browser with automatic updates turned on. I've been running Beta versions of Firefox for >2 years and have not had problems with updates before this. Thanks for any suggestions and solutions!