bug(material.angular.io): stackblitz demos do not load on firefox

[Gouvernathor]

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

When using and , whether it's by MatRadioModule or by MatRadioButton and MatRadioGroup, the IDE extension and the compiler pop no error, but the page fails to load.

Reproduction

Stackblitz infinitely loads for me (never got it to work).
https://v19.material.angular.dev/components/radio/examples

Expected Behavior

it should work

Actual Behavior

The page fails to load (it bails to my project's root for some reason), and pops an error in the console : TypeError: can't access property "MatRadioGroup", ɵhmr3 is undefined

Environment

• Angular: 19.1.0
• CDK/Material: 19.2.19
• Browser(s): Firefox Dev Edition 144.0b8
• Operating System (e.g. Windows, macOS, Ubuntu): Windows

[mmalerba]

While the radio seems to work fine on firefox in the embedded material.angular.dev examples, it does seem that all of the stackblitz demos error and fail to load on firefox. This appears to be an issue with the stackblitz demos we're generating rather than an issue with the components themsevles

[Gouvernathor]

No, this has nothing to do with StackBlitz. It fails with my project being run on my browser directly.

[Gouvernathor]

It also has nothing to do with docs.