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Anidisable is a very handy FF extension that allows to block animated gifs, but still allows to view them when you really want. Unfortunately, it hasn't been ported to FF 3.5 yet. Any alternatives?

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up vote 3 down vote accepted
  1. Type about:config in your address bar
  2. Search for image.animation_mode
  3. Change the value to none

It will show the gif first frame, but will not display the animation.

Agreed, this is less handy then using an extension allowing you to set/unset animated gifs, as was the case with AniDisable. There's a nice tutorial for creating Firefox Extensions at

I just inspected the plugin. It is indeed compatible with Firefox 3.5. Download it from and follow these steps.

  1. Rename the file extension to zip.
  2. Open it with your favorite decompressor.
  3. Extract the file install.rdf.
  4. Edit the following line <em:maxVersion>3.0+</em:maxVersion>
  5. Change it to <em:maxVersion>3.5+</em:maxVersion>
  6. Put it back in the zip file, replacing the old file
  7. Rename the zip extension back to xpi
  8. Install by selecting Open File... from the Firefox File menu

AniDisable works by making changes to the above about:config setting. The changes it does to this setting (none, once, and normal) are still in effect as of Firefox 3.5.

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+1 ... using it myself with FF 3.5.3 – Molly7244 Sep 18 '09 at 18:25

No longer works with FF 3.6. It will appear to install, but there's no contextual menu and the Preferences button within the Add-on description doesn't function either.

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