It doesn't work anymore after the last updates.
The newest version that still works as before is: 2.10.4
As i see the developer issues a number of newer versions , but these doesn't fix the problem.

Used for years, but now I would rather use F12 to find the background image myself than using this useless add-on to see the extra page with extra texts. This was originally designed for simplicity, and yet now it has lost it.

You asked for review and you deserve this. It had been actually a good add-on, simple and functionally clear. But it HAD BEEN, NOT ANYMORE. PLEASE DO NOT ADD RUBBISH!

Doesn't work. Author refuses to fix bugs in Firefox version.

Great extension, it would be awesome if the context menu hand an option to "save background image" directly

Ok

Works well and detects every image behind the cursor. Very useful.