Since this feature was only available on release versions of the app, which cannot be built on TH I've made a local build containing the above patch - [fennec-68.7.0.en-US.android-arm.apk](https://drive.google.com/file/d/1X86m-Zb9PaLqwYFpPI7YgVHwTow9UjCz/view?usp=sharing)
Bug 1623471 Comment 2 Edit History
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~Since this feature was only available on release versions of the app, which cannot be built on TH I've made a local build containing the above patch - [fennec-68.7.0.en-US.android-arm.apk](https://drive.google.com/file/d/1X86m-Zb9PaLqwYFpPI7YgVHwTow9UjCz/view?usp=sharing)~ TH builds, including release - https://treeherder.mozilla.org/#/jobs?repo=try&revision=91c76b483813f69b0da375dce6bf9780c38554aa (Thanks Ryan!)