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I normally have Mozilla Firefox ask me before activating shockwave flash on account of a slight bit of instability I notice when I tried to use YouTube. I have it set to "allow and remember" on most websites, the main exception being YouTube. Recently, however, I accidentally clicked "allow and remember" instead of "allow now" on YouTube because I was tired and it had been a long day. Is there any way to remove YouTube from the exceptions list without simply clearing the exceptions list? I'm using Firefox version 29.

Twisted Code
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2 Answers2

3

Go to the site whose plugin settings you want to change:

  • Right click anywhere on the page and select "View Page Info"
  • Go to the "Permissions" tab
  • Select which plugins should allow/block/ask.
Silveri
  • 2,905
2

Go to about:config page and change devtools.chrome.enabled to true.

Press Shift+F4 to open Scratchpad and switch Environment to Browser.

Copy and paste the following code

var ytprincipal = Cc["@mozilla.org/scriptsecuritymanager;1"]
  .getService(Ci.nsIScriptSecurityManager)
  .getNoAppCodebasePrincipal(Services.io.newURI("http://www.youtube.com", null, null));
Services.perms.removeFromPrincipal(ytprincipal, "plugin:flash");

Click Run and you 're ready!

paa
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