I guess bug 1839366 is the regression of this bug because it changed public visible of intent
Bug 1847141 Comment 12 Edit History
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I guess bug 1839366 is the regression of this bug because it changed visibility of intent here https://github.com/mozilla-mobile/firefox-android/commit/1ea20c146103b547820c6204da7022f2d27a7a2c#diff-461a397023312e6d2b9e3969eb2a95e039c43a25a163ab0b35fbbff81cdf2c81L841