If the font file has incorrect data for xAvgCharWidth then this error will occur. The question then is, can there be a workaround for those who still wish to use their current fonts? An option in about:config or program the function to notice the unusual xAvgCharWidth value and use the old method (3.0.x) to render pages with these fonts.
If the font file has incorrect data for xAvgCharWidth then this error will occur. The question then is, can there be a workaround for those who still wish to use their current fonts? An option in about:config or program the function to notice the unusual xAvgCharWidth value and use the old method (3.0.x) to render pages with these fonts.