Add-on freezes tabs and slows Firefox to a halt
The add-on freezes or slows Firefox and tabs, sometimes triggering a slow-script warning or crash.
Tier I · Proven The best-established problems.
7 public reports · first reported 8 April 2022 · last reported 11 July 2025
What's going wrong
Many users say that once the add-on runs on YouTube, tabs freeze, the whole browser slows down, and Firefox warns that the add-on is causing the slowdown.
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 7 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.