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The Youtube video will not play with Firefox but with Safari!



The Youtube video will not play with Firefox but with Safari!


What can I do to solve this problem?

On the same iMac, there are several accounts. For one of them, Youtube videos will not play in Firefox, but with Safari. For other accounts, Firefox and Safari can play Youtube videos !?

Any suggestions where I can look to solve the problem?

EDIT: I’m sorry. I can’t flag anything because this long lasting (several months) problem has been fixed and I don’t know how! I haven’t changed anything. This must be a side effect of something I did. Probably on my administrative account. The mystery remains forever …

If you don’t have the Adobe Flash plug-in installed you need to do so and give it another go.
Do you have the Firefox “Flashblock” extension installed in any way ?!

To make sure:

  • The Flash plugin is installed and activated correctly in FireFox for all accounts (for example: other flash works)
  • Accounts do not use some sort of block plugin (ads, flash etc.)