This problem arose recently either via updating Firefox to 55.0.2 or updating Flash to 26.0.0.151.
Clicking the full-screen button on Flash videos like this crashes the plugin. Right-clicking on the video (to turn off HW acceleration) also crashes the plugin.
I've tried all the usual solutions, like preloading libGL.so.1 and creating an /etc/adobe/mms.cfg file with the line EnableLinuxHWVideoDecode=0. None of them work.
The same plugin (from the adobe-flashplugin package) works fine with Chromium, just not Firefox. I looked at the suggested solutions at both Mozilla and Adobe, but none seem to fix this problem. Has anyone else encountered this bug?
Update: The crash occurs on both my machine with an NVIDIA adapter, and one with an AMD/ATI adapter.
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