TLS errors and blocked sites while VPN is on
Sites reject secure connections or show TLS errors while the extension is on, and some services cannot be reached.
Tier II · Emerging Problems that are still building up.
3 public reports · first reported 3 February 2026 · last reported 31 August 2026
What's going wrong
Firefox users report that while the Proton VPN extension is connected, some sites refuse the connection or show secure-connection errors.
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 3 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.