Adding Repository key
wget -qO - http://bintray.com/user/downloadSubjectPublicKey?username=bintray | sudo apt-key add -

Adding Source to source.list
echo "deb http://dl.bintray.com/kusti8/chromium-rpi jessie main" | sudo tee -a /etc/apt/sources.list

update apt
sudo apt-get update

install chromium browser
sudo apt-get install chromium-browser -y

download flash21 file


wget http://www.novaspirit.com/wp-content/uploads/2016/06/flash21.tar.xz

untar flash21
tar -xJf flash21.tar.xz

Change directory to pepper
cd pepper

copy all .so files to plugins folder

sudo cp *.so /usr/lib/chromium-browser/plugins

copy all .json files to plugins folder
sudo cp *.json /usr/lib/chromium-browser/plugins

create 01-pepper file
sudo nano /etc/chromium-browser/customizations/01-pepper

insert into 01-pepper file
CHROMIUM_FLAGS="${CHROMIUM_FLAGS} --ppapi-flash-path=/usr/lib/chromium-browser/plugins/libpepflashplayer.so --ppapi-flash-version=21.0.0.182-r1 -password-store=detect -user-data-dir"