ImageTweak is a Mozilla Firefox extension that modifies the way single images (images not embedded within a web page) are displayed. Instead of showing them against a white background in the upper left corner, ImageTweak shows them centered in the window, against a neutral gray background and allows to freely zoom and move the image, much like any decent image viewer.
This functionality was proposed to Mozilla with a RFE (bugzilla bug# 376997). If you think this should be a standard feature of Firefox, then vote for this bug on bugzilla.
Support
The official guide is available in ImageTweak Help.
Support is available mainly through the ImageTweak thread on MozillaZine. For security-critical bug reports you may also send me a mail (the address is available within the source code or on the homepage of the site).
Download
The latest version is available on addons.mozilla.org.
If you like ImageTweak, please leave a review on the download page. Thanks!
Changelog
The changelog is available on the download page.
Locales
ImageTweak is available in the following locales: nl-NL, en-US, fr-FR, de-DE, it-IT, ja-JP, pl-PL, pt-BR.
Old versions
Old versions, although not recommended or supported, are available from the download page linked above.