Looking for feedback on SkipTo.js Firefox and Chrome browser extensions

I have been working to making the features of SkipTo.js more widely available and have been working on browser extensions to make the features available on any website.

One of the features I was able to also include was providing shortcuts to sequentially navigate headings and landmarks on a web page, similar to how TAB works for links and form controls.

Would appreciate any feedback on the extensions and new navigation features.

More information on bowser extensions:
https://skipto-landmarks-headings.github.io/page-script-5/extensions.html

Thank you for your help,
Jon