If you cannot see any content on pages you printed or in print preview, the cause might be margins which are set too high.

1. In order to check the margins, we need to go to File > Page Setup.
2. Once this is done, switch to the Margins & Header/Footer tab.
3. Check what's set there under Margins.

The following are the default values for Margins:

Right: 12.7

Top: 12.7

Left: 12.7

Bottom: 12.7

Check these values accordingly and change them if necessary.

Hello yuvak, yes, exist an issue, see : Bug 1003707 - pdf.js print prints a white page

(please do not comment on bug reports, is for developers)

wait a few days(probably in the end of the week, friday), 29.0.1 firefox will solve the issue

thank you

Firefox 29.0.1 will come out Friday, please update then and print away! :)