- Install Firefox Developer Edition from https://www.mozilla.org/en-GB/firefox/developer/ and run it
- Enter "about:config" in Firefox's URL bar and press Enter
- Search for "xpinstall.signatures.required" and double click the setting to toggle it to "false"
- Download the Firefox WebExtensions prototype build from https://s3.amazonaws.com/io.github.robertknight/hypothesis/prototypes/hypothesis-stage.xpi
- Open it in Firefox by going to File -> Open and selecting the downloaded extension
What works:
- Annotation badge. Looks slightly more attractive than Chrome.