README.md currently starts with:

aw-watcher-web

[][chrome]
[][firefox]

A cross-browser WebExtension that serves as a web browser watcher for [ActivityWatch][activitywatch].

Installation

[...]

... It would be nice to make it a little more obvious how this fits into bigger picture, and why someone may wish to install it.

Maybe something like:

A cross-browser WebExtension that serves as a web browser watcher for [ActivityWatch][activitywatch]. Watches properties of the active browser tab like title, URL, audible and incognito state. Without this, ActivityWatch can only read the window title.

Larger context: See watchers and architecture

... or:

A cross-browser WebExtension that serves as a web browser watcher for [ActivityWatch][activitywatch].

Enables detailed tracking of your web browsing by monitoring tab title, URL, audible state, and incognito status. Without it, ActivityWatch can only read the window title.

Learn more: Watchers • Architecture • Data model

Happy to open a PR.