To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
CloseWelcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.
CloseAbout this Add-on
Since Firefox 57, only webextension add-ons can be supported. That requires almost rewriting a new add-on, which I can not handle. So this add-on will not be updated, my advice is switching to Switchy Omega when it's ready. Here's the link, it's currently beta version, you can help test it if you want.
https://addons.mozilla.org/en-US/firefox/addon/switchyomega/