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Is your feature request related to a problem? Please describe.
Most browsers prevent websites from autoplaying media and sound automatically, by default.
When I, for example, open multiple youtube-videos in different tabs, I think it is very disturbing to see this non-standard behavour.

Describe the solution you'd like
By default, all media is prevented from playing automatically.
V

https://github.com/Pext/Pext/blob/master/docs/installation.rst contains instructions for openSUSE, but more repositories are available (despite being untested).

These need to be documented for the relevant distributions:
Stable: https://download.opensuse.org/repositories/home:/TheLastProject:/python-pext/
Nightly: https://download.opensuse.org/repositories/home:/TheLastProject:/python-pext:/d