Here’s how to install adobe flash player in OpenSolaris:

1. Download the adobe flash player for opensolaris here.

2. When done downloading, It’s time to decompress the package.

bunzip2 flash_player_10_solaris_x86.tar.bz2
tar -vxf flash_player_10_solaris_x86.tar

3. After decompressing the package, copy the decompressed file to firefox plugin directory.

cp -Rpf flash_player_10_solaris_r32_18_x86/libflashplayer.so /usr/lib/firefox/plugins

4. Restart the firefox browser and try to access a site known to have flash objects.