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Memory use balloons to many GB and crashes Firefox

The add-on's memory use climbs to several gigabytes or more until Firefox becomes unusable or crashes.

Tier I · Proven The best-established problems.

6 public reports · first reported 20 November 2024 · last reported 22 July 2026

Idea report · $19 · No contacts · All sales final

See a sample idea report

What's going wrong

Users of this CORS header add-on report memory climbing steadily, in some cases to 8, 10, or even 40 gigabytes, until Firefox freezes, slows badly, or crashes.

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.