After a while of defunction, "view image" button is back and working. Thank you dev! But I'm afraid at the moment "search by image" of this addon is not workings. So, that's why four stars, instead of five.

View Image no longer re-implements anything.

No longer working. Replaced it with custom user script for greasemonkey (I had it installed anyway for many user scripts):
https://gist.github.com/ner00/ec9ae47e202b8e99f19be44a5af6baf3/raw/viewimage.user.js
(taken from: https://github.com/bijij/ViewImage/issues/268#issuecomment-1476294452 )

EDIT - The new update fixes the issues, so I've changed my rating to 5 stars.

ORIGINAL REVIEW - Not currently working, however, there is a userscript that does work posted in the Github discussion on this extension: -

https://github.com/bijij/ViewImage/issues/268#issuecomment-1476294452

That works fine. Hopefully the extension will be updated toon.

Not working anymore..

Not working anymore / Ya no funciona 24 Abr 2023

Currently broken, please fix

Not working with FF 112 or there were some changes at Google. In any case it is not working now (15th April 2023).

It's currently not working so don't bother downloading it

Currently broken

It used to be great, but it no longer works.

UPDATE: April 10, 2023 - not working again. Please fix - thanks! I will mark with 5 stars when working again.

UPDATE 8/5/21-- WORKING AGAIN!!!

UPDATE 8/4/21 This was fantastic and an actual life-enhancer. Sadly, it is not working anymore. I deleted and reinstalled yesterday and it worked briefly, but no it no longer works at all. Could the developer maybe tweak it to work again....? Please....?

dejo de funcionar con la ultima actualizacion de firefox

Must have extension.
But is currently not working.
Upd: is working again.

Extremely useful addon, but a recent update to google image search broke it. Would love to see it fixed.