Extension leaks memory and freezes Firefox
The extension makes Firefox slow, freeze or leak memory until the browser crashes or the computer restarts.
Tier I · Proven The best-established problems.
12 public reports · first reported 2 July 2025 · last reported 13 May 2026
What's going wrong
Many Firefox users say the LanguageTool add-on steadily consumes memory, sometimes tens of gigabytes, which makes the browser lag, freeze or crash and in some cases pushes the whole computer into restarts.
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 12 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.