How to block images in Firefox? (add-ons not working on certain websites)

I use a Firefox add-on called ImageBlock. It's usually excellent, but it doesn't work at all on Wikipedia or Amazon.com and when I right click an image at either of those websites I'm not given the option to add it to the block list. I installed SettingSanity and unchecked "load images" in Firefox Options but that didn't work either. What should I do to block images from there in Firefox?

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2 Answers

There is a relevant bug (1196784) that affects Firefox 38 thru 45. It might have been fixed in Firefox 48, scheduled for release in August 2016.

A possible workaround:
In about:config, toggle preference dom.image.srcset.enabled to false.
That will disable srcset, a new feature which allows web pages to provide different images for different screen resolutions. (Of course you would reset the pref to true when Firefox 48 arrives.) I verified the fix with Image Block on Wikipedia, using Firefox 45. No doubt there are sites and situations where this solution wouldn't be ideal though.

Update: Image Block 3.1 seems to work in spite of the Firefox bug.

Go to about:config, search for this option "permissions.default.image" change to 1.

Possible values:

0 -- always load the images

1 -- never load the images

2 -- dont load third images

Reference:

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