TUMBLEWEB — browser extension
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Roll up any web page. Click the toolbar button (or press Alt+Shift+T, or
right-click the page) to start. Click again, or press Esc, to put the page back.

Install in Chrome, Edge, Brave or Arc (use tumbleweb-chrome.zip)
  1. Unzip this folder somewhere you'll keep it.
  2. Go to chrome://extensions (edge://extensions in Edge).
  3. Turn on "Developer mode" (top right).
  4. Click "Load unpacked" and choose the unzipped tumbleweb folder.
  5. Pin Tumbleweb from the puzzle-piece menu so the button is always visible.

Install in Firefox 121 or newer (use tumbleweb-firefox.zip)
  1. Go to about:debugging#/runtime/this-firefox
  2. Click "Load Temporary Add-on…" and choose manifest.json in this folder.
  Firefox removes temporary add-ons when it restarts. A permanent install
  needs the add-on to be signed by Mozilla.

Notes
  - It only runs when you click it. Nothing is sent anywhere.
  - It can't run on browser pages (chrome://, about:) or extension stores.
  - Best times are saved per page in that site's own storage.
