Rated 5 out of 5 stars

Yeap this extension is a must have for me, it has some very cool features and i like it a lot, but for me it was not perfect yet so some more things could be fixed or make it better like:
# This about:config option "extensions.imagetweak.legacyscrolling" should be an normal option IMO.
# It should be possible to define the amount of % of zoom it does per zoom step something like 50% at each zoom step, so the behavior was something like this, start at 100% of zoom, 1 + zoom so the zoom was now 150%, 1 more zoom step and now the zoom was 200% and so on and so on.
# The option "Place image at top left" its not working, at least with version 3.6.12 of Firefox and even with a clean profile without any others extensions.
# I don't know if it was possible or not, but if it is it's nice to have an option to the zoom do not do the normal AA they do.
# And finally i like to see an option for the image do not get centered, i wold like to have the image on left side like the Firefox do in the default behavior.

Anyway i rate this extension whit a 5* because it sure deserves that! ;-)

Many Thanks!

This review is for a previous version of the add-on (0.20.1-signed.1-signed). 

# This about:config option "extensions.imagetweak.legacyscrolling" should be an normal option IMO.

It was a difficult decision to take, but for the sake of consistency with the firefox UI I had to do it. In 0.22 that preference will be available in the pref window.

# It should be possible to define the amount of % of zoom it does per zoom step something like 50% at each zoom step, so the behavior was something like this, start at 100% of zoom, 1 + zoom so the zoom was now 150%, 1 more zoom step and now the zoom was 200% and so on and so on.

I think multiplicative zoom is better, but if more people ask for it I'll do it.

# The option "Place image at top left" its not working, at least with version 3.6.12 of Firefox and even with a clean profile without any others extensions.

Place image at top left by design won't work unless the image is bigger than the window.

# I don't know if it was possible or not, but if it is it's nice to have an option to the zoom do not do the normal AA they do.

This will be available in 0.22 by pressing the 'p' key

# And finally i like to see an option for the image do not get centered, i wold like to have the image on left side like the Firefox do in the default behavior.

Why would you like it better that way?