What is Iceweasel?

Iceweasel is a fork [from Firefox] with the following purpose :

1. backporting of security fixes to declared Debian stable version.

2. no inclusion of trademarked Mozilla artwork (because of #1 above)

Beyond that, they will be basically identical.

Step # 01
Launch the browser and download the Flash Player in a separate folder.
Download link = http://get.adobe.com/flashplayer/
(Note: Version to download tar.gz for other Linux)

Step # 02
Launch the terminal and open the folder path where downloaded flash file is stored then run the following command.

or

If in case your downloaded file having some another name then put that file name during extracting

Step # 3
Now run the following last command (Remember: Do not change the folder path stay in the same folder where you unpacked the files)