Firefox Support Forum

If I use my touch monitor when a video player is full screen, the full screen Firefox window turns grey and becomes unresponsive to mouse and touch input. I can exit full screen with Esc or F but the problem persists in full screen mode until I restart Firefox. Picture attached is my monitor when Firefox is in full screen mode.

Suddenly I am no longer able to launch any internet searches. Using google (normally) or bing I receive one of two messages, "Deceptive site" warning or "Server not found"??????????????????????

I get the SEC_ERROR_UNKNOWN_ISSUER on some websites like google and youtube. I can't go past it and it is super anoying. I tried setting the security.enterprise to true but that makes my browser super slow so that is not an option. How can I get rid of this?

After installing the Native MathML extension (to get MathML typeset equations on the Wikipedia, as suggested on mediawiki.org), all equations set by MathJax/MathML turned to using STIX instead of Latin Modern. I'd like them to stick to Latin Modern instead.

The only possibly related setting I've found is `font.name-list.serif.x-math` in about:config, whose value is `Latin Modern Math, STIX Two Math, […]`. I tried to manually change the font family specification of some text to see if Firefox could use Latin Modern Math to begin with, but apparently it can't (see first screenshot attached), while it loads STIX allright (second screenshot). Latin Modern is not the first locally installed typeface I haven't been able to use, but it's the first one I have really tried to (I don't remember which one the other typeface was).

My Latin Modern font comes from TeX Live 2019 installed using the TUG installer, not Fedora's package manager. `fc-list | grep -i "latin modern math"` returns `/usr/local/texlive/2019/texmf-dist/fonts/opentype/public/lm-math/latinmodern-math.otf: Latin Modern Math:style=Regular`. I'm running Firefox 87 on Fedora 33.

Turned on my imac this morning and the Firefox browser gave a "Error code: SEC_ERROR_BAD_SIGNATURE" for every page I tried to open. I have reinstalled the browser and that one is working properly. However, when I try to add Dashlane to it, the old browser opens and the same error message is displayed making it impossible to use Dashlane on the newer version of the browser. How can I get rid of the version that opens up when I try to install Dashlane on the working browser?

Locking this thread.
Please continue here: [/questions/1331107]
每次B站一打开过几秒就是图上的情况。 已经更新到最新版本，Windows系统也更新了，但是问题没有得到解决。

Locking this thread.
Please continue here: [/questions/1331107]
每次B站一打开过几秒就是图上的情况。 已经更新到最新版本，Windows系统也更新了，但是问题没有得到解决。

Hi,

I had to delete all my profiles and completely reinstall Firefox because Firefox was not changing the color of previous websites to purple no matter what I tried. I thought I could delete the profiles and create a brand new one to start over fresh.

After reinstalling Firefox (latest version) I have run into a problem where under <about:addons> <Plugins> it shows a yellow box and an error saying "Widevine Content Decryption Module provided by Google Inc. will be installed shortly".

This message won't go away and Widevine will not be installed at all. I cannot browse and Netflix, Hulu, HBO Max etc.

I have tried unchecking and checking the <Play DRM-controlled content> under <about:preferences> which does not work.

I have also tried going to this (link)link and manually installing it but the webpage for my OS's .zip file won't load for me.

a similar problem in a browser installed with apt (but when running in safe mode, there is no problem, and manually disabling extensions and cleaning / refreshing firefox, does not help). When installing via snap, there is no such thing, but it does not suit me for work, since there is a problem with profiles.

I would be very grateful for your help in solving this problem.

Details: Имя Firefox Версия 87.0 ID сборки 20210318103112 ID дистрибутива canonical User Agent Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:87.0) Gecko/20100101 Firefox/87.0 ОС Linux 5.8.0-48-generic #54~20.04.1-Ubuntu SMP Sat Mar 20 13:40:25 UTC 2021

When I open FF, the window only displays the top menus. If I click the Green dot it will then open full screen. Pressing the green dot once again only displays that 1 inch window. The problem does not occur in safe mode for Firefox. I turned off all of my extensions and turned off hardware Accelerator mode yet the problem still happens.

This just began yesterday and I don't believe I installed anything.

I keep getting a message that a web page is slowing my browser down. And it is terribly slow. How can I get rid of this frustrating issue? I think I even know the web page that it is.

Suddenly as of the last update to FireFox 88.0, the embedded screen capture function disappeared. I use it a LOT... I will have to go back to previous version of FireFox.

Hello, from my HP Z840 Workstation, FTTH connection, Windows10Pro 64bit, Malwarebyte installed, I daily open this photography store website, www.msmaterialefotografico.it and here's the timing:

Chrome 5 seconds Firefox 100 seconds

What is wrong? Thanks for you help

Keep getting the following when trying to access a standard site I have gone to hundreds of times.

Access Denied You don't have permission to access "http://www1.bmoharris.com/api/us-banking/auth/authenticate-widget?" on this server.

Reference #18.36a83817.1619023449.289bb174

For anyone who uses Google Hangouts/Chat, they know that you can send screenshots to people and pictures you've taken. This used to work great, and as expected on Firefox, when you click on the image, it opens a new tab that shows the images full size (because in the chat box it's usually too small to be legible). Now, in a recent update (either 87 or 88), this functionality was broken. Now you can't click the image, it's as though there's no "link" to open the new tab. This works just fine in Microsoft Edge, so I know it's not a Google issue, but rather a Firefox browser issue.

Anyone know how to have this resolved, or to report the bug?

Hello, I have a really annoying problem with Firefox. Many times when I try to access a bank website or similar that I have saved as a favorite, Firefox hangs up and stops responding without indication as to what may be wrong. This can happen when I open Firefox and go to the site before any other or after viewing other sites first. I have to go to the windows task manager and stop the process. After about a minute or two, I can go back, open the browser and log in to the site without any problem.

I have the browser set not to remember history (which is exactly what I want) and using Bitdefender antivurus. I am not sure if this is a common occurrence or if there is a known fix. Problem is becoming annoying enough that I considering not using Firefox any more.

Any help you can provide would be appreciated.

Thank you

When banking with RBC Royal Bank, many links on page not working, also cannot sign out when finished. Using Firefox with Windows 7 professional. Pls advise if issue is due to operating system, will upgrade if necessary. Problem is very recent, have used Firefox for many years with no trouble whatsoever.

Cheers,

Todd