Always Show Scrollbar од communism420

Always Show Scrollbar keeps native vertical and horizontal scrollbars visible on websites that hide them with CSS.

Choose where the extension runs: on all supported websites, individual domains, wildcard subdomains, or local files when Firefox permits access.

Features:
- Restores page scrollbars and existing scrollable containers.
- Supports vertical and horizontal scrolling.
- Domain filter updates in real time.
- Popup with an enabled-domain counter and a shortcut to domain settings.
- Interface languages: English, Spanish, German, Portuguese (Brazil), Russian, Ukrainian, and French.
- No advertising, analytics, tracking, telemetry, remote code, or external requests.
- Fully open source under the MIT License.

The extension cannot modify Firefox-controlled pages such as about: pages or addons.mozilla.org.