Click the Suse icon Kmenu in the Taskbar, got to Computer then click nstall Software, and in Search box enter: flash-player
Need the dash between flash and player
Put a check mark in the box to the left of flash-player to install:
Click Accept at bottom right and follow prompts.
Open firefox, type about
lugins in firefox address box and icheck to see if Flashplayer showed up as a plugin.
This next step may not be necessary, so probably only use it if it doesn't initially work: In Firefox, open Edit, Preferences, Applications and go down to Shockwave Flash File, to the right of
this, select Use Shockwave Flash (in Firefox) drop down arrow with several choices.
Test sound. If it doesn't work, right click on the sound icon in the Sytem Tray, click Show Mixer Window and moved the PCM
If Gnash is installed, it may conflict with flash-player so uninstall it if it is installed.
Not sure which Opensuse you are using, I did this in 11.2.