May I ask your version of the stable Firefox? I just used Firefox release (124.0.1) and Firefox Developer Edition (125.0b5) on mac, and the result looks OK with me, with my [test case](https://software.hixie.ch/utilities/js/live-dom-viewer/?%3C!DOCTYPE%20html%3E%0A%3Cstyle%3E%0A%23target%20%7B%0A%20%20border%3A%201px%20white%20solid%3B%0A%20%20width%3A%2090%25%3B%0A%20%20height%3A%2090%25%3B%0A%20%20scale%3A%200.5%3B%0A%7D%0A%3C%2Fstyle%3E%0A%3Cdiv%20style%3D%22width%3A%20200px%3B%20height%3A%20200px%3B%20background%3A%20green%3B%22%3E%0A%20%20%3Cdiv%20id%3Dtarget%3E%3C%2Fdiv%3E%0A%3C%2Fdiv%3E) in Comment 1. > Also, could you elaborate what you mean by sub-pixel rendering? Firefox uses a different way to handle sub-pixels(e.g. 0.5px line) and anti-alias, compared to other browsers, so the result may have some difference, compared to other browsers. However, in this case, it doesn't make sense that the border disappears. So if it still happens on the newest version, it is a Firefox bug definitely.
Bug 1888270 Comment 3 Edit History
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May I ask your version of the stable Firefox? I just used Firefox release (124.0.1) and Firefox Developer Edition (125.0b5) on mac, and the result looks OK with me, with my [test case](https://software.hixie.ch/utilities/js/live-dom-viewer/?%3C!DOCTYPE%20html%3E%0A%3Cstyle%3E%0A%23target%20%7B%0A%20%20border%3A%201px%20white%20solid%3B%0A%20%20width%3A%2090%25%3B%0A%20%20height%3A%2090%25%3B%0A%20%20scale%3A%200.5%3B%0A%7D%0A%3C%2Fstyle%3E%0A%3Cdiv%20style%3D%22width%3A%20200px%3B%20height%3A%20200px%3B%20background%3A%20green%3B%22%3E%0A%20%20%3Cdiv%20id%3Dtarget%3E%3C%2Fdiv%3E%0A%3C%2Fdiv%3E) in Comment 1. > Also, could you elaborate what you mean by sub-pixel rendering? Firefox uses a different way to handle sub-pixels(e.g. 0.5px line) and anti-alias, compared to other browsers, so the result may have some difference, compared to other browsers. However, in this case, it doesn't make sense that the border disappears. So if it still happens on the newest version, it is a Firefox bug definitely.
May I ask your version of the stable Firefox? I just used Firefox release (124.0.1) on mac and Firefox Developer Edition (125.0b4) on windows, and the result looks OK with me, with my [test case](https://software.hixie.ch/utilities/js/live-dom-viewer/?%3C!DOCTYPE%20html%3E%0A%3Cstyle%3E%0A%23target%20%7B%0A%20%20border%3A%201px%20white%20solid%3B%0A%20%20width%3A%2090%25%3B%0A%20%20height%3A%2090%25%3B%0A%20%20scale%3A%200.5%3B%0A%7D%0A%3C%2Fstyle%3E%0A%3Cdiv%20style%3D%22width%3A%20200px%3B%20height%3A%20200px%3B%20background%3A%20green%3B%22%3E%0A%20%20%3Cdiv%20id%3Dtarget%3E%3C%2Fdiv%3E%0A%3C%2Fdiv%3E) in Comment 1. > Also, could you elaborate what you mean by sub-pixel rendering? Firefox uses a different way to handle sub-pixels(e.g. 0.5px line) and anti-alias, compared to other browsers, so the result may have some difference, compared to other browsers. However, in this case, it doesn't make sense that the border disappears. So if it still happens on the newest version, it is a Firefox bug definitely.
May I ask your version of the stable Firefox? I just used Firefox release (124.0.1) on mac and Firefox Developer Edition (125.0b4) on windows, and the result looks OK with me, with my [test case](https://software.hixie.ch/utilities/js/live-dom-viewer/?%3C!DOCTYPE%20html%3E%0A%3Cstyle%3E%0A%23target%20%7B%0A%20%20border%3A%201px%20white%20solid%3B%0A%20%20width%3A%2090%25%3B%0A%20%20height%3A%2090%25%3B%0A%20%20scale%3A%200.5%3B%0A%7D%0A%3C%2Fstyle%3E%0A%3Cdiv%20style%3D%22width%3A%20200px%3B%20height%3A%20200px%3B%20background%3A%20green%3B%22%3E%0A%20%20%3Cdiv%20id%3Dtarget%3E%3C%2Fdiv%3E%0A%3C%2Fdiv%3E) in Comment 1. > Also, could you elaborate what you mean by sub-pixel rendering? Firefox uses a different way to handle sub-pixels(e.g. 0.5px line) and anti-alias, compared to other browsers, so the result may have some difference. However, in this case, it doesn't make sense that the border disappears. So if it still happens on the newest version, it is a Firefox bug definitely.
May I ask your version of the stable Firefox? I just used Firefox release (124.0.1) on mac and Firefox Developer Edition (125.0b4) on windows, and the result looks OK with me, with my [test case](https://software.hixie.ch/utilities/js/live-dom-viewer/?%3C!DOCTYPE%20html%3E%0A%3Cstyle%3E%0A%23target%20%7B%0A%20%20border%3A%201px%20white%20solid%3B%0A%20%20width%3A%2090%25%3B%0A%20%20height%3A%2090%25%3B%0A%20%20scale%3A%200.5%3B%0A%7D%0A%3C%2Fstyle%3E%0A%3Cdiv%20style%3D%22width%3A%20200px%3B%20height%3A%20200px%3B%20background%3A%20green%3B%22%3E%0A%20%20%3Cdiv%20id%3Dtarget%3E%3C%2Fdiv%3E%0A%3C%2Fdiv%3E) in Comment 1. > Also, could you elaborate what you mean by sub-pixel rendering? It's just a guess, though it's unlikely to happen for a straight line. Firefox uses a different way to handle sub-pixels(e.g. 0.5px line) and anti-alias, compared to other browsers, so the result may have some difference. However, in this case, it doesn't make sense that the border disappears. So if it still happens on the newest version, it is a Firefox bug definitely.
May I ask your version of the stable Firefox? I just used Firefox release (124.0.1) on mac and Firefox Developer Edition (125.0b4) on windows, and the result looks OK with me, with my [test case](https://software.hixie.ch/utilities/js/live-dom-viewer/?%3C!DOCTYPE%20html%3E%0A%3Cstyle%3E%0A%23target%20%7B%0A%20%20border%3A%201px%20white%20solid%3B%0A%20%20width%3A%2090%25%3B%0A%20%20height%3A%2090%25%3B%0A%20%20scale%3A%200.5%3B%0A%7D%0A%3C%2Fstyle%3E%0A%3Cdiv%20style%3D%22width%3A%20200px%3B%20height%3A%20200px%3B%20background%3A%20green%3B%22%3E%0A%20%20%3Cdiv%20id%3Dtarget%3E%3C%2Fdiv%3E%0A%3C%2Fdiv%3E) in Comment 1. > Also, could you elaborate what you mean by sub-pixel rendering? It's just a guess, though it's unlikely to happen for a straight line. Firefox uses a different way to handle sub-pixels (e.g. 0.5px line) and anti-alias, compared to other browsers, so the result may have some difference. However, in this case, it doesn't make sense that the border disappears. So if it still happens on the newest version, it is a Firefox bug definitely.