A browser extension for Chrome and Firefox that adds one toolbar button to expand or collapse every <details> block inside GitHub pull request and issue comments. Built for teams whose CI (Atlantis, GitHub Actions, Terraform) posts dozens of collapsible output blocks per PR.

• One click on the toolbar icon opens every collapsible section on the page; a second click closes them.
• If any block is closed, all open; if all are open, all close.
• Touches only <details> inside comment bodies (.js-comment-body), never GitHub's own UI.
• Works on github.com and its *.github.com subdomains.
• Plain JavaScript, no dependencies, no build step.
• Manifest V3 on both browsers.

Firefox: install from Firefox Add-ons.

Chrome, Edge or Brave (no store listing):

1. Clone or download this repository.
2. Open chrome://extensions/, turn on Developer mode, click Load unpacked and pick the repository folder.
3. Open any pull request with collapsed blocks and click the toolbar icon.

• How it works: the two scripts, the message between them, and the browser table

GPL-3.0-or-later