User agent spoofing silently breaks after updates
Spoofing stops working after new add-on or Firefox versions, and per-container and whitelist modes fail silently.
Tier I · Proven The best-established problems.
16 public reports · first reported 5 August 2020 · last reported 26 July 2025
What's going wrong
Many users say this User-Agent Switcher worked well for a long time and then stopped applying its chosen user agent after an add-on update or a new Firefox release.
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 16 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.