Is your feature request related to a problem? Please describe.

I find that the extension has a significant impact on my eyes when setting grey/whitelists. I could not find any other issue related to this, so I thought it could be something to be considered.

Describe the solution you'd like

Implement a inverted or dark color scheme for the extension UI.

**Describe alternatives y

Microsoft Edge should probably work out of the box since it's Chromium based, but we should make sure that it's officially supported.

The links to revisions can take a different form, depending on the repository it is found in:

    const revisionURL = record.meta.repo === 'mozilla-central'
      ? `https://hg.mozilla.org/mozilla-central/pushloghtml?changeset=${record.revision}`
      : `https://github.com/mozilla-mobile/fenix/commit/${record.revision}`;

Ensure we have this these URL templates in the config file