I didn't say you are experiencing the same bug: I said it sounded related; like, having used the workaround from it is teaching us about what aspects of the ren

I didn't say you are experiencing the same bug: I said it sounded related; like, having used the workaround from it is teaching us about what aspects of the rendering might be broken. Regardless, if you can give me a PDF file that experiences the issue I would be happy to try to get it fixed, as we shouldn't be sad at Firefox for a bug they aren't fixing if they don't yet have it filed... once it is filed, then we can be sad, as it almost always takes them years to fix anything (if they do at all ;P). FWIW, though, you'd made it sound like this happens to you a lot... if this is really just happening to your PDF of your book generated by some weird website I've never heard of that is generating PDF files with their own code, it is quite possibly a bug in the PDF file and maybe it makes sense to fix Firefox (especially if it really is a font routing bug), but if the PDF file is sufficiently broken there should be some threshold for claiming it is a bug in the file, not the renderer.