Mozilla Firefox
In Mozilla Firefox, open up the about:debugging#/runtime/this-firefox page. Select Load Temporary Add-on... button and choose the manfiest.json in this repository - the extension should now be pinned to the task bar.
Google Chrome
In Google Chrome, open up chrome://extensions. Make sure the Developer Mode checkbox in the upper-right corner is turned on. Click Load unpacked and select this repository directory - the extension should now be pinned to the task bar.
Brave
In Brave, open up brave://extensions. Make sure the Developer Mode checkbox in the upper-right corner is turned on. Click Load unpacked and select the dist directory in this repository - the extension should now be pinned to the task bar.