Seems a very useful addon:
I have just tested it quickly for a big image i wanted explore in detail and your addon does the job easily (without the need of remember Shortcut etc...).

Simple and with beautiful and intuitive interface:
That perfect.

And i haven't yet explore the others functions..
thanks :-)

Edit 25/10/26: BetterViewer is back to its old glory! It replaces the default image viewer again by default. 10/10

This extension is unironically better than any built-in photo editor/viewer Windows ever had by default. 99% of the things I want to do with the picture, I can do while it's still in the browser.
Crazy good.

Edit: Changed from 5/5 to 1/5 since features got either wrecked by FF updates and/or dev ditched the support.

Edit2: He updated it, nice.

Great extension, thank you!

Amazing addon. If there is a way to, please allow this for installation in android. It is working pretty well, but needs a specific third-party firefox fork to install.

5/5 for being the only 'image viewer' extension out of the dozen I've tried with the ability to pan/move the entire image within the space of the browser, instead of it being locked in the center.

Does exaclty what it says and that in a very smooth way.

best viewer in ff

Perfect. Works exactly as it says. Gonna recommend this to everyone

best image viewer there is