Viewhance is a browser extension that adds extra functionality to the browser's default image/media viewer. URL for sharing: https://tiny.cc/Viewhance
Install the latest version for
The WebExtension version can be installed from AMO.
If you're looking for the legacy version, which could potentially run on PaleMoon, Waterfox or other Gecko based browsers, then check out the archive folder.
Install from Chrome Web Store.
Other browsers based on the Chromium platform, or follow the WebExtension API are also able to run this version, such as Opera 15+, Vivaldi, Edge...
To install on Opera 12, download the extension file and drop it into the browser window.

In Opera 15+, the extension must be manually enabled in the Extension manager (Ctrl+Shift+E) after install.

Opera 12 12
Opera 15+ 15+
Install from Maxthon Extension Center, or newer versions from the archive, because as it seems Maxthon doesn't really review extension updates anymore
Safari 5.1+
You have to install it from source. Not that it is build with the legacy platform, and Safari 12 is the last release to support legacy extensions.
	+ Added feature
	* Improved/changed feature
	# Bug fixed


	Browsers (only the latest versions of each browser are fully supported)
		opr: Opera 12
		ffx: Firefox, SeaMonkey (possibly other Gecko based browsers)
		chr: Chrome (or other clones of Chromium, like Vivaldi, Opera 15+, Yandex Browser...)
		sfr: Safari <=12 (legacy)
		mxt: Maxthon