**Environment:** Operating system: Windows 10 Firefox version: Firefox 128.0 **Steps to reproduce:** 1. Navigate to: https://www.mapbusinessonline.com 2. Observe **Expected Behavior:** The page loads **Actual Behavior:** Browser does nothing **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/139430
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**Environment:** Operating system: Windows 10 Firefox version: Firefox 128.0 **Steps to reproduce:** 1. Navigate to: https://www.mapbusinessonline.com 2. Observe **Expected Behavior:** The page loads **Actual Behavior:** Browser does nothing **Notes:** - Reproduces regardless of the status of ETP - Reproduces in Firefox Nightly, and Firefox Release - Does not reproduce in Chrome - Turning off `network.http.http2.allow-pus` solves the issue Created from https://github.com/webcompat/web-bugs/issues/139430