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Console error from ContentBlockingPrefs.init

We get a console error at startup:

Error in processing browser-first-window-ready for ContentBlockingPrefs.init BrowserUtils.sys.mjs:543:17
Error: Failed to load moz-src:///browser/components/protections/ContentBlockingPrefs.sys.mjs

and at shutdown:

resource:///modules/BrowserGlue.sys.mjs, line 589: Error: Failed to load moz-src:///browser/components/protections/ContentBlockingPrefs.sys.mjs

Likely because the protections component is removed in "BB 26345: Hide tracking protection UI".

Probably a ESR-140 rebase error. @brizental or @pierov do you have an existing issue to relate this to? I couldn't find it.

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