how can I re-establish sound for online sites like youtube

7 年前

2017/9/14 晚上9:29

Sound in all my youtubes and interviews is gone.

Answer 1 · 2017-09-14 21:29:36

2017/9/14 晚上10:15

Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

Answer 2 · 2017-09-14 21:29:36

2017/9/14 晚上10:38

still no sound

Answer 3 · 2017-09-14 21:29:36

2017/9/14 晚上11:44

rickraesler said

still no sound

Have you checked the obvious : that the 'mute' key on your keyboard
hasn't inadvertently been pressed ?

Would you please take a look at this article :