• For Opera for Linux_x64
• Goto the URL

  opera://about

  and look at the “Browser identification” (User-Agent) string to see what major version of Chromium Opera is using (79, 80, 81, 82 etc.). Also, take note of the “install” path. You'll need that later.

• Goto https://github.com/iteufel/nwjs-ffmpeg-prebuilt/releases/ and download the latest <version>-linux-x64.zip that's built with the same major version of Chromium that your Opera is.
• For example, if your Opera is built with Chromium 79, goto https://github.com/iteufel/nwjs-ffmpeg-prebuilt/releases/tag/0.43.6 and download 0.43.6-linux-x64.zip.
• Once you have the zip/deb file, extract it to get libffmpeg.so
• Then, create the folder lib_extra in Opera's install folder that you took note of in

  opera://about

• Put libffmpeg.so in the lib_extra folder.

• What I did was simply use wayland instead of X11, and it solved the problem completely:

• sudo apt-get install gnome-session-wayland

 
sudo mkdir /media/<username>/<mount name>
sudo chown <username>:<username> /media/<username>/<mount name>

sudo mount -t cifs -o username=$USER,password=<smb password),uid=$USER,gid=$USER //<smb server>/<share> /media/<username>/<mount name>

sudo mount -t cifs -o username=jgawoods,password=ggg123,uid=jules,gid=jules //personalcloud.local/jgawoods /media/jules/jgawoods
sudo umount /media/jules/jgawoods