MastoBridge by FilippoD

If you have a Mastodon account and you browse the entire Fediverse through the web, this addon allows you to get in your federated timeline any public message posted on another server, just by opening the message and clicking on the MastoBridge icon in the address bar (or the MastoBridge entry in the addons menu on Android). All you have to do is set your Mastodon account URL in the options and freely browse the Fediverse.