**Environment:** Operating system: Windows 10 Firefox version: Firefox 130.0/132 **Preconditions:** - account required **Steps to reproduce:** 1. Go to https://my.mts-link.ru/ 2. Log into your account. 3. Observe the red banner at the top of the page. **Expected Behavior:** Unsupported banner is not displayed. **Actual Behavior:** Unsupported banner is displayed. **Notes:** - Reproduces regardless of the status of ETP - Reproduces in Firefox Nightly, and Firefox Release - Does not reproduce in Chrome Created from https://github.com/webcompat/web-bugs/issues/141738
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**Environment:** Operating system: Windows 10 Firefox version: Firefox 130.0/132 **Preconditions:** - account required **Steps to reproduce:** 1. Go to https://my.mts-link.ru/ 2. Log into your account. 3. Observe the red banner at the top of the page. **Expected Behavior:** Unsupported banner is not displayed. **Actual Behavior:** Unsupported banner is displayed. (RU - Ваш браузер не поддерживает технологии, необходимые для проведения мероприятий / EN - Your browser does not support the technologies needed to host events) **Notes:** - Reproduces regardless of the status of ETP - Reproduces in Firefox Nightly, and Firefox Release - Does not reproduce in Chrome Created from https://github.com/webcompat/web-bugs/issues/141738