I to facing same problem "All of our PDF file build in Abode Indesign CS4. If any pdf open with mozilla, will come error message will be come on top of page. why this error coming every time and every pdf files"

Hi,

This happens to me multiple times a day and there's really no reason for it. It essentially sounds like Firefox is saying, "Hi, I'm not very good at this, so please just open this file in another app before I get really self-conscious..."

That's pretty bad... especially for Mozilla.

I'm VERY glad to have the built-in PDF viewer, however. Thanks again!

Thank u very much

hello, the pdf viewer is still somewhat experimental and under very active development - you could try if the same error is occurring in the current development version, which you can download as an addon from http://mozilla.github.io/pdf.js/extensions/firefox/pdf.js.xpi

in case it has the the same rendering problems, you could then file a bug report at https://github.com/mozilla/pdf.js/issues (a github account is necessary for it though) - please also provide a sample document where the error is apparent!