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how to speed up the playback (by default) of all videos of any sites.

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how to speed up the playback (by default) of all videos of any sites.

how to speed up the playback (by default) of all videos of any sites.

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McCoy
  • Top 10 Contributor
534 solutions 5035 answers

Duplicate question.

Please, continue here :

https://support.mozilla.org/en-US/questions/1242949

Duplicate question. Please, continue here : https://support.mozilla.org/en-US/questions/1242949