Updated Linux Distribution from OpenSUSE 13.1 to OpenSUSE 13.2 on 2 systems
which comes with firefox 33.0. Since then, most pages with flash crashed on
call. Updates also to 33.1 from mozilla repo but same result.
Try it with nightly (firefox-36.0a1.en-US) and nightly works without any
problems on flash pages. Can't identify my problem directly but I think, this
bug could be the reason.

I think, it's bug #1074860
(https://bugzilla.mozilla.org/show_bug.cgi?id=1074860)
Please patch firefox or update.