Firstly, if the copy from getfirefox.com works then use it--there is are no compelling reasons to use the rpm from Suse. Other than it can be updated via package managers I guess ?
Secondly, I suspect that the problem is in the plugins where one of the flash players is not the correct version--or simply does not work on some sites. For example I, and others, cannot get VIDEO when going to Foxnews; the AUDIO is there but not the picture when trying to play a video (the problem is with Foxnews actually). The problem is not only with flash, also embedded audio and video using
Basil Chupin wrote: the mplayerplug-in.
When you have Firefox running (try both "versions"-getfirefox and Suse) type in the URL window "about:plugins" (without the quotes) and all the installed plugins will be shown. Take a note of what they are and versions. Compare this list against the "other" version.
Versions are the same (as they should be, ~/.mozilla/plugins links to /usr/lib/browser-plugins, this is what the rpm uses as well right?).
BTW, there is a beta out for version 9 of the Shockwave Flash (current installed version is 7). Don't bother getting the beta unless you are happy to restart Firefox halfway thru playing something when the whole shebang goes into a reverberating echo mess. Mind you the lipsync has been fixed in this beta but the "lockup" is something else :-( .
Cheers.
//Sylvester