Firefox pegs old Core 2 Duo CPUs at full load
Firefox drives an old Core 2 Duo to 100% load on some sites, causing freezes and suspected kernel instability.
Tier II · Emerging Problems that are still building up.
6 public reports · first reported 11 October 2026 · last reported 11 October 2026
What's going wrong
Owners of older Intel Core 2 Duo laptops report that Firefox drives the processor to 100 percent load on some websites, which leads to freezes and, in some cases, suspicions of kernel instability on Linux.
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 6 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.