It's decent, but there are some major shortcomings caused by the WebExtensions API. For example if you somehow get caught in address bar, you can only leave it

It's decent, but there are some major shortcomings caused by the WebExtensions API. For example if you somehow get caught in address bar, you can only leave it by pressing Enter or reaching for the mouse and clicking somewhere else. Another inconvenient feature is the time it takes for the extension to be loaded. On bloated and slow pages, I have to wait for a second or two while pressing the shortcuts to switch to another tab or anything. Basically the whole extension-driven keyboard UI locks up waiting for the page to finally load. And this is not because these extensions are slow, but because they get initialized only some time after the webpage has already begun loading.