Add strict_min_version to manifest.json

[missmatsuko]

On July 21, 2019, this extension was disabled on addons.mozilla.org (AOM) for not specifying strict_min_version in manifest.json.

This setting is generally optional, but there are some cases where it's required:
AOM - When do you need an add-on ID?

As far as I can tell, this extension does not match any of the criteria above.

I've already updated the add-on's settings in AOM to 54. This is the earliest version where chrome_url_overrides is supported, which contains the configuration that opens the add-on's HTML file whenever new tabs are opened. This setting overrides anything that's set in manifest.json, so I felt that a code change (and new release) was not necessary.

Adjusting application information here will allow users to install your add-on even if the install manifest in the package indicates that the add-on is incompatible.

[missmatsuko]

Hopefully the add-on will be enabled again soon, but it's entirely dependant on the reviewer(s).

Planning on adding this code change with the next feature, or if someone really wants this to be downloadable on Firefox again.

The review process on AOM has been incredibly frustrating, and a lot of extra work on my part to support ~4 downloads.

If you're looking to add this extension to Firefox and it's still not enabled in AOM, you can also download this repo and load the extension locally.