impossible to play certain videos on firefox Solved/Closed

Question

Hello,  Windows 7 64-bit  Configuration: Windows / Firefox 55.0 For the past three or four days, I can no longer watch certain videos on Firefox, while I can watch them on Chrome. I get the message: your browser does not support any of the available formats when I click on the link it states "What features is this browser compatible with?" in red the formats that do not work: H.264 and WebM VP8  As I was asked to update Adobe Flash Player for some of these videos, I did so and I even tried several times because it has no effect.  I searched for an answer on your site and others, and all of them date back to 2012 or even earlier and I found nothing that works.  By the way, I also noticed that Firefox often crashes.  So I don’t know what to do anymore Thank you for your help!

Dori@n · Accepted Answer

Hello,  Type about:support in the address bar at the top. Press Enter. Click on Repair Firefox.  What does the repair feature do?All your Firefox settings and personal information are stored in a profile folder. The reset works by creating a new profile folder for you, while keeping your essential data.Extensions and themes normally stored within the Firefox profile folder will be removed. Add-ons stored in other locations, such as plugins, will not be removed, but all modified preferences (such as the plugins you have disabled) will be reset.Firefox will save the following items: your bookmarks your browsing history your passwords your open windows, tabs, and tab groups your cookies your auto-filled web form information your personal dictionary The following items and settings will be removed: Add-ons and themes, website permissions, modified preferences, added search engines, download history, DOM storage, security settings for certificates and devices, download preferences, plugin settings, toolbar customizations, user styles, and social network settings will be removed. Note: your old Firefox profile is backed up on your desktop in a folder named "Old Firefox Data." If the repair doesn't resolve your issue, you can restore some of the unsaved information by copying the files into the newly created profile. If you no longer need this folder, it is better to delete it as it contains sensitive information.    -- Sincerely The courage of a raindrop is that it dares to fall in the desert. In this world that proves to be scorching, every fox carries its tail in its own way.

Dori@n · Answer

Hello,  It must be there..... check your documents but well....  -- Best regards The courage of the drop of water is that it dares to fall in the desert. In this world that turns out to be scorching, each fox carries its tail in its own way.

Dori@n · Answer

Re,  As soon as it may not work, do it like this:   Download on your Desktop ResetBrowser Run it. Click on OK. Click on the corresponding buttons for your browsers. Wait for the operation to complete. When everything is done, close the tool.   Here is the detailed list of actions taken for each browser:Chrome and Firefox:Backing up your favorites and passwords.Removing cookies, history, cache, and temporary files.Removing all installed extensions (active or inactive).Uninstalling the browser.Reinstalling the browser.Restoring your favorites and passwords.Internet Explorer:Removing cookies, history, cache, and temporary files.Removing all installed extensions (active or inactive).Removing all search engines (other than Google.com).Cleansing shortcuts.   -- Sincerely The courage of the drop of water is that it dares to fall in the desert. In this world that proves to be scorching, each fox carries its tail in its own way.

kaneagle · Answer

Hello,  Uninstall Firefox and reinstall it cleanly.  Go to Start Control Panel Folder Options View tab Check --> Show hidden files and folders Apply and OK.  Then, Control Panel Programs and Features Uninstall Firefox During the uninstallation, you will be asked to remove all files related to your profile, check the box and accept. Restart the PC.  Go delete the mozilla folder in these 3 directories: Windows key + E --> C:\Users\your username\AppData\Roaming --> C:\Users\your username\AppData\Local --> C:\Program Files (X86) and/or Programs  Delete the Firefox shortcuts on the desktop.  Reinstall it according to your choice of version: --> Firefox 32 bits --> Firefox 64 bits   Human beings are at their best when things are at their worst.

Annie553388 · Answer

I apologize, Dori@n and Kaneagle, I was away without a computer for a while and I didn't thank you, it works now!

Dori@n · Answer

Hello,  You're welcome.  -- Regards The courage of the drop of water is that it dares to fall in the desert. In this world that proves to be scorching, each fox carries its tail in its own way.

unpassant33 · Answer

Thank you Dori@n, I also solved my reading problem with this simple manipulation and it works!

Impossible to play certain videos on firefox

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