Package: firefox-esr Version: 91.5.0esr-1~deb10u1 Severity: normal
Dear Maintainer, I recently upgraded from Firefox 78 ESR to 91.5.0 ESR. After doing that, I observed screen tearing in the browser window when scrolling a web page. I did not expect the tearing; I expected the web page to scroll smoothly, as it did in 78 ESR. The tear appeared for me as a diagonal line; it started at the upper right corner of the web page display area and ran "southwest" (down and to the left) to about the center of the web page display area. The line did not extend to the menus or toolbars in the browser; it was only visible in the web page display area. The tear only appeared when I was scrolling a web page that was taller than the browser window. It appeared when I was scrolling both up and down. It appeared both with using the mouse wheel to scroll, and using the scroll bar at the side of the window to scroll. The tear wasn't "permanent" - when I stopped scrolling, everything on the web page displayed correctly. A good test case was any long Wikipedia page. Scrolling such a page made the tear visible on the lines of text or images on the page. I Googled and found a solution (changing things in about:config), which I will post as a follow-up. Thanks! Matt Roberds -- Package-specific info: -- Addons package information -- System Information: Debian Release: 10.11 APT prefers oldstable-updates APT policy: (500, 'oldstable-updates'), (500, 'oldstable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.19.0-18-amd64 (SMP w/2 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: sysvinit (via /sbin/init) LSM: AppArmor: enabled Versions of packages firefox-esr depends on: ii debianutils 4.8.6.1 ii fontconfig 2.13.1-2 ii libatk1.0-0 2.30.0-2 ii libc6 2.28-10 ii libcairo-gobject2 1.16.0-4+deb10u1 ii libcairo2 1.16.0-4+deb10u1 ii libdbus-1-3 1.12.20-0+deb10u1 ii libdbus-glib-1-2 0.110-4 ii libevent-2.1-6 2.1.8-stable-4 ii libffi6 3.2.1-9 ii libfontconfig1 2.13.1-2 ii libfreetype6 2.9.1-3+deb10u2 ii libgcc1 1:8.3.0-6 ii libgdk-pixbuf2.0-0 2.38.1+dfsg-1 ii libglib2.0-0 2.58.3-2+deb10u3 ii libgtk-3-0 3.24.5-1 ii libpango-1.0-0 1.42.4-8~deb10u1 ii libstdc++6 8.3.0-6 ii libx11-6 2:1.6.7-1+deb10u2 ii libx11-xcb1 2:1.6.7-1+deb10u2 ii libxcb-shm0 1.13.1-2 ii libxcb1 1.13.1-2 ii libxcomposite1 1:0.4.4-2 ii libxdamage1 1:1.1.4-3+b3 ii libxext6 2:1.3.3-1+b2 ii libxfixes3 1:5.0.3-1 ii libxrender1 1:0.9.10-1 ii procps 2:3.3.15-2 ii zlib1g 1:1.2.11.dfsg-1 Versions of packages firefox-esr recommends: ii libavcodec58 7:4.1.8-0+deb10u1 Versions of packages firefox-esr suggests: ii fonts-lmodern 2.004.5-6 ii fonts-stix [otf-stix] 1.1.1-4 ii libcanberra0 0.30-7 ii libgssapi-krb5-2 1.17-3+deb10u3 pn pulseaudio <none> -- no debconf information
