Ghounter (aka GitHubCounter)

The Ghounter Safari Extension displays the download count on any Releases page in GitHub.

How to install:

On the App Store (iOS and macOS): Ghounter
Manually download the latest release or go to the Releases page and choose your prefered version. Note external extensions are no more supported on Safari 12+.

How it works:

It just shows the downloads count near each release in GitHub. No toolbar elements, no bars, nothing else.

An example:

Using Chrome, Firefox, Edge, Brave...

Just use chrome-github-release-downloads from @addshore, as this one is based on it.

It uses:

contentscript.js from chrome-github-release-downloads, many thanks to @addshore's work. It is all the code this extension runs.
Icon based on this one made by Nick Roach.