The extension is intended to complement image features that (I think) is missing from Opera by default or give features that are just simply useful.
- - Imagus is the most popular Windows, Mac & Linux alternative to ImagePreviewer.
- - Imagus is the most popular free alternative to ImagePreviewer.
Hover your mouse over any image on the supported websites and the extension will automatically enlarge the image to its full size, making sure that it still fits into the browser window.
- - Hover Zoom+ is the most popular Open Source alternative to ImagePreviewer.
Browse images galleries with ease: move the mouse cursor over thumbnails to view images in their full size without loading a new page. Pictures are automatically resized if they don't fit the window.Warning
As written at http://www.reddit.com/r/technology/comments/1t4ubn/hoverzoom_for_chrome_is_infected_with_malware/ , it seems to contain malware. Be careful!
The free Thumbnail Zoom Plus add-on for Firefox shows the full image when you hover over a thumbnail or image link.
Thumbnail Zoom Plus FeaturesDiscontinued
Browse more efficiently: Preview links and images without leaving your current tab. Mouseover any link and click the 'ez' icon (or press ALT and mouseover link) to show the linked page in a separate preview overlay or split screen.
Install Linkz.ai in 2 minutes on your website or blog and instantly get automatic rich link previews on hover. Linkz.ai previews help your visitors to get context from linked content without bouncing between browser tabs, and, most importantly, without leaving your site.
- - Linkz.ai is the most popular Web-based & SaaS alternative to ImagePreviewer.
Shows a full size image when you hover over thumbnails on popular websites like Facebook, Twitter or Amazon.Discontinued
Not compatible with Firefox Quantum. URL also unavailable.
Preview image when mouse over image link.
Image Preview (Firefox addon) FeaturesDiscontinued
Hover for Safari allows you to expand any image, link, or GIF just by hovering over it. With extensive support for popular websites, you'll be able to browse media-heavy content with ease. Say goodbye to clicking links and loading a new webpage just to view an image.
- - Hover for Safari is the most popular commercial alternative to ImagePreviewer.
Hover for Safari Features