The should never be used as a browser plugin on a machine connected to the internet. Hackers actively exploit CVE-2011-0611 (the "FlashPwn" exploit) and dozens of others from 2007–2011 that Adobe never patched in version 9.
Because this is a repack, you must verify it yourself. After download, scan the EXE with or VirusTotal . A legitimate repack of Flash 9 should not : Flash Player V9.0.246 Offline REPACK Download
In the golden age of the early web (roughly 2006–2008), Flash Player 9 was king. Version 9.0.246 was a particularly notable release, bridging the gap between the simple animation tools of the past and the rise of full-fledged browser games (think Line Rider , Fancy Pants Adventures , and early YouTube video players). The should never be used as a browser
If you encounter any issues during installation or use, here are some troubleshooting tips: After download, scan the EXE with or VirusTotal