I‘ve verified this issue using the latest Firefox Nightly 100.0a1 (Build ID: 20220315091352) on Windows 10 x64, macOS 11.6, and Ubuntu 20.04. - The Focus Promo image is displayed on Private Window and its source is "chrome://browser/content/assets/focus-promo.png". Tested using the Nightly steps from [comment 9](https://bugzilla.mozilla.org/show_bug.cgi?id=1756860#c9).
Bug 1756860 Comment 12 Edit History
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I‘ve verified this enhancement using the latest Firefox Nightly 100.0a1 (Build ID: 20220315091352) on Windows 10 x64, macOS 11.6, and Ubuntu 20.04. - The Focus Promo image is displayed on Private Window and its source is "chrome://browser/content/assets/focus-promo.png". Tested using the Nightly steps from [comment 9](https://bugzilla.mozilla.org/show_bug.cgi?id=1756860#c9).