Adobe has released
Flash Player 10.1 where critical vulnerabilities have been identified in Flash Player 10.0.45.2 and earlier versions can cause the application to crash and allow an attacker to take control of affected system.So it is recommended to install latest Flash Player version 10.1 in your Computer. Installing flash player online these days is much tough task when compared to installing
Flash player 10.1 offline, I my self observed downloading
flash player from Firefox browser from adobe website downloaded and installed
Adobe Download Manager plug-in (getplusplus) and also Adobe Download Manager failed to download and install flash player in my Computer thus it seems much better and easier to use
Flash player 10.1 offline installer instead.

Reminding you that installing
Flash player 10.1 offline will install flash player for Firefox , Opera,Safari and Chrome browsers but not for other browsers like
Internet Explorer.Since IE requires to install ActiveX Control in your Computer.
You can install flash player online for Internet Explorer and other browsers by
visiting this page.
Download Flash Player 10.1 offline installer
Update:Here is
offline installer link of flash player for IE (Thanks to CC)
Update 1 :
Download link for Flash Player 11 offline Installer
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