(For completeness, here's a screenshot of just the icon from Caspy7's initial screenshot, zoomed up 10x so you can see the pixels and that it is in fact antialiased. For me at least, I think the jagged look (when viewed at the actual resolution in comment 0) comes from how the 1px-thick-border fails to draw the expected color in some spots -- there are various points along the border where there's no pixel that's close to the intended border-color, just due to how antialiasing works out. (The idealized border is only 1px thick, and in cases where the "ideal" location for a pixel falls ~exactly between two pixels, the brightness/color gets smeared between those two pixels.) This ends up making the color & thickness/smoothness look kinda variable as you move your eyes around the circle.
Bug 1919439 Comment 13 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
(For completeness, here's a screenshot of just the icon from Caspy7's initial screenshot, zoomed up 10x so you can see the pixels and that it is in fact antialiased. For me at least, I think the jagged look (when viewed at the actual resolution in comment 0) comes from how the 1px-thick-border fails to draw the actual specified border-color in some spots -- there are various small slices along the border where there's no pixel that's close to the specified border-color, just due to how antialiasing works out. (The idealized border is only 1px thick, and in cases where the "ideal" location for a pixel falls ~exactly between two pixels, the brightness/color gets smeared between those two pixels.) This ends up making the color & thickness/smoothness look kinda variable as you move your eyes around the circle.
(For completeness, here's a screenshot of just the icon from Caspy7's initial screenshot, zoomed up 10x so you can see the pixels and that it is in fact antialiased. For me at least, I think the jagged look (when viewed at the actual resolution in comment 0) comes from how the 1px-thick-border fails to draw the actual specified border-color in some spots -- there are various small slices along the border where there's no pixel that's close to the specified border-color, just due to how antialiasing works out. (The idealized border is only 1px thick, and in cases where the "ideal" location for a pixel falls ~exactly between two pixels, the brightness/color gets smeared between those two pixels. And so that point on the 1px-thick border ends up just looking like a "cutout". This ends up making the color & thickness/smoothness look kinda variable as you move your eyes around the circle.)