LoginPress - Customize and secure your boring WordPress login pages
Imagus - The extension is intended to complement image features that (I think) is missing from Opera by...
Patchstack - Monitor all your WordPress sites for security vulnerabilities found by our community of ethical hackers.
Image Max URL - Help find larger or original versions of images, including a customizable image popup feature
teddit - Education & Reference and Social & Communications
Thumbnail Zoom Plus - The official site of the Thumbnail Zoom Plus add-on for Firefox