Add-on stops working on YouTube with no fix
The YouTube quality add-on stops working entirely and stays broken after updates, restarts or reinstalls.
Tier I · Proven The best-established problems.
42 public reports · first reported 22 September 2020 · last reported 1 October 2026
What's going wrong
Many Firefox users say the YouTube High Definition add-on quit working at some point, sometimes after a few days, a browser restart, or a YouTube change.
AI-assisted: written with the help of AI from the reports. The idea report has the full summary.
In the idea report
- The full summary.
- The products the 42 reports are about, and how many came each month.
- Related problems.
No business has been found with this problem yet, so the report has no contacts. All sales are final — no refunds. Pricing.