shims not working in v96

for some reason, even when in strict mode, shims are not working in this release.

• go to https://www.etsy.com/
• click on "Sign in"

expected behavior: facebook button login works, console shows that facebook sdk has been replaced by shims.

actual behavior: facebook button login doesn't work, console shows that facebook sdk has been blocked by TP.

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some prefs I tested, they were missing in my profile:

pref("extensions.webcompat.enable_shims", true);

doesn't change the behavior, although it should.

these didn't help either (I'm not sure what they do atm):

pref("extensions.webcompat.perform_injections", true);
pref("extensions.webcompat.perform_ua_overrides", true);

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this is a usability issue, TP is actually working as reported in the console and strict mode is actually set as we can see from https://privacytests.org/ results.