fix(profiles): remove faulty testExtension from fix/installExtension

[JalilArfaoui]

• We only call installExtension when we know it is not installed
• We cannot call browser.runtime.* when not in extension context

Currently, this is broken :

[JalilArfaoui]

:tada: This PR is included in version 3.97.0 :tada:

The release is available on GitHub release

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