https://connect.mozilla.org/t5/discussions/abnormal-protruding-block-on-firefox-window-outer-frame-under/m-p/134390#M54082 <P>I am using Firefox Nightly 155.0a1 on Windows 10 22H2 running inside a virtual machine (entity machine not yet tested).</P><P>Issue: There is an abnormal protruding/outlined block on the outer window frame (outside the content area, part of the browser chrome/window decoration) of Firefox. It looks like a misrendered segment of the window border — a small raised/blob-like area sticking out from the frame edge, not related to any web page content.</P> Mon, 10 Aug 2026 12:34:34 GMT RavenVI 2026-08-10T12:34:34Z https://connect.mozilla.org/t5/discussions/abnormal-protruding-block-on-firefox-window-outer-frame-under/m-p/134390#M54082 <P>I am using Firefox Nightly 155.0a1 on Windows 10 22H2 running inside a virtual machine (entity machine not yet tested).</P><P>Issue: There is an abnormal protruding/outlined block on the outer window frame (outside the content area, part of the browser chrome/window decoration) of Firefox. It looks like a misrendered segment of the window border — a small raised/blob-like area sticking out from the frame edge, not related to any web page content.</P> Mon, 10 Aug 2026 12:34:34 GMT https://connect.mozilla.org/t5/discussions/abnormal-protruding-block-on-firefox-window-outer-frame-under/m-p/134390#M54082 RavenVI 2026-08-10T12:34:34Z