Right Click doesn't work
For the past few weeks, my right click button has not worked. YouTube videos do not show up (there's a blank space where the video should be) and nothing shows in the download button.
I read several articles already, and they all say the same thing- Go to the menu button to blah blah blah. CLICKING THE MENU BUTTON DOES NOTHING.
I've uninstalled and reinstalled. It fixes the problem for a day or two, then it re-appears.
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Please update to the most recent version of Firefox:
Also sometimes extensions and addons can cause issues like this in Firefox, try Safe Mode to temporarily disable these: Try Firefox Safe Mode to see if the problem goes away. Firefox Safe Mode is a troubleshooting mode that temporarily turns off hardware acceleration, resets some settings, and disables add-ons (extensions and themes).
If Firefox is open, you can restart in Firefox Safe Mode from the Help menu:
- Click the menu button
, click Help 
and select Restart with Add-ons Disabled.
If Firefox is not running, you can start Firefox in Safe Mode as follows:
- On Windows: Hold the Shift key when you open the Firefox desktop or Start menu shortcut.
- On Mac: Hold the option key while starting Firefox.
- On Linux: Quit Firefox, go to your Terminal and run firefox -safe-mode
(you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
When the Firefox Safe Mode window appears, select "Start in Safe Mode".
If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, theme, or hardware acceleration. Please follow the steps in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article to find the cause.
To exit Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.
When you figure out what's causing your issues, please let us know. It might help others with the same problem.