I recently switched to Ubuntu and find that I can't watch video on most websites (YouTube is an exception). I've read some tutorials and questions on this site that suggest to just download it from Ubuntu Software, but it can't be found in there.
How would you install Adobe Flash without it and how to even find out if it is already installed?
I'm using Ubuntu 18.04.3 LTS and Firefox 69.0.1 (both 64-bit)
Is the Multiverse repository already enabled? Check in Software and Updates (the fourth line of repositories). If not, do
sudo add-apt-repository multiverse && sudo apt update
or enable by clicking on it then clicking [Close].Once Multiverse is enabled, run
sudo apt install flashplugin-installer
then close Firefox if it was open.Relaunch Firefox and go to https://helpx.adobe.com/flash-player.html ; scroll down to section 5. Verify whether Flash Player is installed . Hit "Activate Adobe Flash" and click on "Allow Now" to enable flash player only for a current website or click "Allow and Remember" to enable Flash Player on all websites.
Do you see animation? If so, it installed OK.