I was trying to create some presentation (prezi.com) and it warranted to install Flash plugin for Chromium running in Arch Linux. Well the instructions in Adobe flash player website are not of much help, and neither the ones in Arch Wiki. To crack it straightaway i know that we need a dynamic library for flash plugin and find a way to load it in chromium browser.
Step 1 : Download the adobe flash player the tar.gz version from the Adobe website . Choose between 32/64 bit variant.
Step 2 : Untar it to a folder and look for the libflashplayer.so file. Copy it into /usr/lib/chromium/plugins. If plugins directory is non-existant, create one. Note that plugins and extensions directory are not the same.
Step 3 : Start chromium with the --enable-plugins option
You are good to go.