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VPN extension fails to connect on Firefox

The VPN extension fails to connect or never gets past a startup or error screen on Firefox.

Tier I · Proven The best-established problems.

9 public reports · first reported 16 September 2023 · last reported 19 October 2025

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

See a sample idea report

What's going wrong

Many Firefox users report that the AdGuard VPN add-on never establishes a connection.

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 9 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.