Chromium install instructions producing error due to manifest version

[colinjcampbell]

Just tried installing to Chromium browser and was getting errors because manifest v2 is no longer supported. I edited two lines in manifest.json and reloaded the extension and it seems to be working:

• Line 2 : "manifest_version": 2, --> "manifest_version": 3,
• Line 6: "browser_action": { --> "action": {

Might be a more proper way to update this, but this seems to make it functional again.

[Roshan-R]

Thankfully migrating to manifest v3 isn't a problem for this small extension. Since you already seem to have a working fix, do you want to raise a PR ?