Thanks Luca! As you mentioned, this is a regression of Bug 1422056. It should only affect Beta and Nightly, not Release [See pref config here](https://searchfox.org/mozilla-central/rev/652014ca1183c56bc5f04daf01af180d4e50a91c/modules/libpref/init/StaticPrefList.yaml#6909). The permission is added by origin here: https://searchfox.org/mozilla-central/rev/652014ca1183c56bc5f04daf01af180d4e50a91c/browser/app/permissions#24. Since the origin string does not include any origin attributes, the permission is only applied for the normal window. An intermediate fix would be to add (and probably also for the other entries): ``` origin install 1 https://private-network.firefox.com^privateBrowsingId=1 origin install 1 https://fpn.firefox.com^privateBrowsingId=1 ``` Ideally though, permissions added via this file should be set for all origin attributes. We should look into this, especially when we are going to isolate by user context and private browsing in release at some point.
Bug 1597751 Comment 2 Edit History
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Thanks Luca! As you mentioned, this is a regression of Bug 1422056. It should only affect Beta and Nightly, not Release [See pref config here](https://searchfox.org/mozilla-central/rev/652014ca1183c56bc5f04daf01af180d4e50a91c/modules/libpref/init/StaticPrefList.yaml#6909). The permission is added by origin here: https://searchfox.org/mozilla-central/rev/652014ca1183c56bc5f04daf01af180d4e50a91c/browser/app/permissions#24. Since the origin string does not include any origin attributes, the permission is only applied for the normal window. An intermediate fix would be to add (probably also for the other entries): ``` origin install 1 https://private-network.firefox.com^privateBrowsingId=1 origin install 1 https://fpn.firefox.com^privateBrowsingId=1 ``` Ideally though, permissions added via this file should be set for all origin attributes. We should look into this, especially when we are going to isolate by user context and private browsing in release at some point.