Hello, I am having the same problem with icecat-60.3.0-gnu1 from commit c71bbfc, but with a different font:
... (/gnu/store/iin8fiv8bc11r7wnxck57rhfb74v7d57-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:15119): Pango-WARNING **: 18:04:29.559: failed to create cairo scaled font, expect ugly output. the offending font is 'Nimbus Sans L 10' (/gnu/store/iin8fiv8bc11r7wnxck57rhfb74v7d57-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:15119): Pango-WARNING **: 18:04:29.560: font_face status is: file not found (/gnu/store/iin8fiv8bc11r7wnxck57rhfb74v7d57-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:15119): Pango-WARNING **: 18:04:29.560: scaled_font status is: file not found (/gnu/store/iin8fiv8bc11r7wnxck57rhfb74v7d57-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:15119): Pango-WARNING **: 18:04:29.560: shaping failure, expect ugly output. shape-engine='PangoFcShapeEngine', font='Nimbus Sans L 10', text='●' (/gnu/store/iin8fiv8bc11r7wnxck57rhfb74v7d57-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:15119): Pango-WARNING **: 18:04:29.562: failed to create cairo scaled font, expect ugly output. the offending font is 'Nimbus Sans L 11.666015625' (/gnu/store/iin8fiv8bc11r7wnxck57rhfb74v7d57-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:15119): Pango-WARNING **: 18:04:29.562: font_face status is: file not found (/gnu/store/iin8fiv8bc11r7wnxck57rhfb74v7d57-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:15119): Pango-WARNING **: 18:04:29.562: scaled_font status is: file not found (/gnu/store/iin8fiv8bc11r7wnxck57rhfb74v7d57-icecat-60.3.0-gnu1/lib/icecat/.icecat-real:15119): Pango-WARNING **: 18:04:29.562: shaping failure, expect ugly output. shape-engine='PangoFcShapeEngine', font='Nimbus Sans L 11.666015625', text='Zwölf Boxkämpfer jagen Viktor quer über den großen Sylter Deich.' ... This is Guix on top of Debian. My previous version was 52.6.0, so I cannot say when things broke... I kept the old version since I wanted to use the Requestpolicy extension. The problem persists after deleting $HOME/.cache/fontconfig and running fc-cache -f -v It also persists when removing $HOME/.mozilla (which surprisingly is not recreated when running icecat). Andreas
