Solution to Ubuntu 20.04 Firefox cannot play videos (missing flash plug-in)

1. Flash plug-in package download address: https://get.adobe.com/cn/flashplayer/

Local download:

Adobe Flash Player browser flash playback plug-in v32.0.0.207

Adobe Flash Player for Firefox 28.0.0.126 Chinese official latest version

2. Unzip the downloaded file: tar xzvf flash_player_npapi_linux.x86_64.tar.gz
3. Open the terminal and change the path to the lib directory: cd /usr/lib
4. Create a directory under the lib directory: sudo mkdir -p mozilla/plugins
5. Copy libflashplayer.so to the /usr/lib/mozilla/plugins directory: sudo mv libflashplayer.so /usr/lib/mozilla/plugins
6. Copy the files in usr in the downloaded file to /usr: sudo cp -r usr/* /usr
7. Restart the browser Note: Steps 5 and 6 need to be performed in the directory where the file is located.

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