> you can also see this bug still reproducing even on a larger-screen device if you tap the "View more" link below the list of sign-in options; I'll post screenshots showing what that breakage looks like. Here's a screenshot showing this. See Firefox on the left side here, doing two bad things: (1) pushing the header (currently with "Adobe" logo) off the top of the screen, making it unscrollable (note, sometimes there's more intended-to-be-read text here as in comment 18's screenshot) (2) placing the login-provider-buttons superimposed with the footer-text ("Copyright 2025 Adobe" etc). (You can't see that footer-text in the Chrome right-hand portion of my screenshot; take my word for it that it's just offscreen, and nicely visible.) If I toggle the aforementioned off-by-default pref (`layout.css.grid-flex-spanning-items-intrinsic-sizing.enabled`) to `true`, then we change to the expected results here, fully matching Chrome's layout shown on the right on both of these^ points.
Bug 1914395 Comment 24 Edit History
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> you can also see this bug still reproducing even on a larger-screen device if you tap the "View more" link below the list of sign-in options; I'll post screenshots showing what that breakage looks like. Here's a screenshot [edit: screenshot is in my next comment] showing this. See Firefox on the left side here, doing two bad things: (1) pushing the header (currently with "Adobe" logo) off the top of the screen, making it unscrollable (note, sometimes there's more intended-to-be-read text here as in comment 18's screenshot) (2) placing the login-provider-buttons superimposed with the footer-text ("Copyright 2025 Adobe" etc). (You can't see that footer-text in the Chrome right-hand portion of my screenshot; take my word for it that it's just offscreen, and nicely visible.) If I toggle the aforementioned off-by-default pref (`layout.css.grid-flex-spanning-items-intrinsic-sizing.enabled`) to `true`, then we change to the expected results here, fully matching Chrome's layout shown on the right on both of these^ points.
> you can also see this bug still reproducing even on a larger-screen device if you tap the "View more" link below the list of sign-in options; I'll post screenshots showing what that breakage looks like. Here's a screenshot [edit: screenshot is in my next comment] showing this. See Firefox on the left side here, doing two bad things: (1) pushing the header (currently with "Adobe" logo) off the top of the screen, making it unscrollable (note, sometimes there's more-important-than-just-a-logo text that gets pushed out of view here, as in comment 18's screenshot) (2) placing the login-provider-buttons superimposed with the footer-text ("Copyright 2025 Adobe" etc). (You can't see that footer-text in the Chrome right-hand portion of my screenshot; take my word for it that it's just offscreen, and nicely visible.) If I toggle the aforementioned off-by-default pref (`layout.css.grid-flex-spanning-items-intrinsic-sizing.enabled`) to `true`, then we change to the expected results here, fully matching Chrome's layout shown on the right on both of these^ points.
> you can also see this bug still reproducing even on a larger-screen device if you tap the "View more" link below the list of sign-in options; I'll post screenshots showing what that breakage looks like. Here's a screenshot [edit: screenshot is in my next comment] showing this. See Firefox on the left side here, doing two bad things: (1) pushing the header (currently with "Adobe" logo) off the top of the screen, making it unscrollable (note, sometimes there's more-important-than-just-a-logo text that gets pushed out of view here, as in comment 18's screenshot) (2) placing the login-provider-buttons superimposed with the footer-text ("Copyright 2025 Adobe" etc). (You can't see that footer-text in the Chrome right-hand portion of my screenshot; take my word for it that it's just offscreen, and nicely visible if you scroll down.) If I toggle the aforementioned off-by-default pref (`layout.css.grid-flex-spanning-items-intrinsic-sizing.enabled`) to `true`, then we change to the expected results here, fully matching Chrome's layout shown on the right on both of these^ points.