@hypothes_is Hi! Any reason you don't have a Firefox extension? Most Chrome extensions are compatible now, often just a manifest change needed.
You can easily test by dropping your Chrome extension file on this page: https://www.extensiontest.com/
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
You can easily test by dropping your Chrome extension file on this page: https://www.extensiontest.com/