Simplify Mastodon

LIMITED BY DEFAULT:

• Firefox doesn't enable :has() in CSS by default (which this extension uses a lot).
• So to get the full functionality on Firefox, you have to enable this flag under about:config: layout.css.has-selector.enabled
• More info here: https://caniuse.com/css-has

FEATURES:

• Centers content (puts posts into cards with space between them, dims actions until hover, hides title bar on scroll, puts left and right columns at edge of window)
• Puts compose and search on right, minimized to an icon unless in use
• Puts nav on left and minimizes to icons unless you hover
• Hides trends and nav items I don't think are useful (Local, Federated, Favorites, Bookmarks, and Lists) -- might add a way to expand or customize this in future

DISCLAIMERS:

• Works on top ~300 Mastodon servers (but it may not work on yours; I'm trying to find a better way to make this work on a product that could be on thousands of different domains)
• Does NOT currently do anything on the multiple column view (aka Advanced Web View)
• Does NOT currently do anything if your window is < 1175px wide (where the UI shifts)