Viewhance
Additional functionality for the browser's default image and video viewer.
Viewhance - Advanced Media Viewer for Firefox
"Viewhance" is a Firefox add-on that empowers the browser's native image and video viewer with a plethora of customization options and enhanced functionalities. It provides features like switching between sizing modes, custom CSS, floating menu, mouse wheel zooming, content centering, rotate/flip media, and much more. It also supports native DASH, HLS, MSS streaming and has advanced options of sending the URL to different reverse image search services. Moreover, it gives users autonomy to customize media attributes and to open images from regular web pages.
Add-on stats
Weekly download count: 29
Firefox on Android: No
Risk impact: High risk impact 
Risk likelihood:
Manifest version: 2
Permissions:
- <all_urls>
- storage
- webRequest
- webRequestBlocking
Size: 399.44K
URLs: Website
Ranking
Other platforms
Not available on Chrome
Not available on Android
Not available on Edge
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Add-on summary
Enriches the built-in media viewer with different customization possibilities and functionality.
Features:
- Default sizing modes and switching between them via shortcuts or mouse clicks
- Custom CSS (background color for the page or media, hidden scrollbars...)
- Custom information about the media in the tab title
- Floating menu (mouse cursor over the top-left)
- Mouse wheel zooming (off by default)
- Centering content (default)
- Rotate/Flip (via shortcuts or from the menu)
- Sending the URL to different services (such as reverse image search)
- Frame extraction for animated images (GIF, APNG, WEBP)
- Handling SVG and data:URIs
- Forced inlining (show media instead of download)
- Native DASH, HLS, MSS streaming (if the browser can support it)
User reviews
These summaries are automatically generated weekly using AI based on recent user reviews.
Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate,
spammy, or outdated. Pros
- Easy to use and works well after browser restart
- Provides a clean and curated experience
- Highly praised by users for its functionality
Cons
- Right-click or shortcut options for opening images do not work in Firefox 106 without a browser restart
- GitHub repository for support is archived, limiting user feedback
Most mentioned
- Issues with right-click shortcuts not functioning properly without restarting
- High praise for the add-on's overall quality and utility
User reviews
by Firefox user 17156250, 2025-01-26
by igorlogius, 2025-01-11
by The Porn Directory, 2024-03-01
Add-on safety
Risk impact
Viewhance requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk likelihood
Viewhance has earned a fairly good reputation and likely can be trusted.
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