I want to be able to use Lumo using the latest Firefox Extended Support Release (ESR) version, so that I can continue to use Lumo on my company notebook that does not support other browser brands.

Since yesterday (1 Nov 2025) I receive a message that says "Unsupported browser". There has been no communications to inform us that the Firefox Extended Support Release (ESR) version will no longer be supported. Our browser version is fully up-to-date, at the time of writing it is 115.29.0 Firefox ESR October 14, 2025 and no newer version of Firefox ESR has been released at this point.

Therefore we urgently request this browser to be supported, in conformity with what has also been stated in the following page, where it is explicitly mentioned that Firefox is supported and even recommended:

https://proton.me/support/recommended-browsers

Please act with urgency! Thank you.