console warning Rated 4 out of 5 stars

mutating the [[Prototype]] of an object will cause your code to run very slowly; instead create the object with the correct initial [[Prototype]] value using Object.create preferences.jsm:467:0

This user has 2 previous reviews of this add-on.

I can fix this easily at the cost of dropping support for Firefox <24... which I guess is acceptable by now.

(The only code affected by the warning is preferences-related code, which is only run on window creation and preference change, and there's not a whole lot of that code, so there's probably no user-visible slowdown.)

Suggestions for version 2.0 Rated 3 out of 5 stars

It seems to work, but is hard to tell sometimes. I've been using it mostly on "endless" web sites like Amazon and EBay. You can stop the page from loading *now*, but there could be 20 more asynchronous events set to activate momentarily. While I don't know if either is possible, I'd love to see two refinements:

1) Stop the page from loading and keep it stopped. Unless the user submits a form or activates some other trigger, automatically kill all other network traffic.
2) Automatically stop downloads of animated GIF's that are larger than xxx K.

These are a bit out of scope, in the sense that they'd massively complicate the extension (it's a very tiny wrapper around a single function call in Firefox).

If there's a simple way to outright disable Javascript in a page, it'd be interesting to do that. (You'd need a refresh to reenable the JS though.)

Forever grateful for this add-on Rated 5 out of 5 stars

If you missed the anitmated-gif-stopping function of the Esc key that was removed from Firefox a few years ago, this add-on gives it back to you just like it used to be.
And then more: it includes and surpasses SuperStop (which only offers the Shift+Esc key combination) to offer both Esc and Shift+Esc combinations to be customised as you prefer. Well thought out and well done!

Rated 5 out of 5 stars

Needs updating soon. Otherwise very good! Should be a feature!

Rated 5 out of 5 stars

Does exactly what it says. What more can I say. Big thanks to the dev!

It doesn't work Rated 1 out of 5 stars

Not for me. Not on dialup. Tried all options of Esc and shift-Esc.

Mozilla has to fix Firefox.

It seems to be working fine for me in the latest Holly build (i.e. pressing Esc stops animation).

You could try this extension instead: https://addons.mozilla.org/en-US/firefox/addon/toggle-animated-gifs/. It can even toggle animation back on.

Finest Remediation for the Esc Featurectomy I Have Seen Rated 5 out of 5 stars

I have tried two add ons that restore the viscously destroyed Esc feature that had formerly been provided for decades since the days of Netscape Navigator and of the two I like this one the best.