Adobe Flash is proprietary software and hence Fedora does not include it by default
Flash plugin
You have to chose either based on the hardware architecture you are using.
x86_64 (64-bit)
sudo yum install http://linuxdownload.adobe.com/adobe-release/adobe-release-x86_64-1.0-1.noarch.rpm -y
x86 (32-bit)
sudo yum install http://linuxdownload.adobe.com/adobe-release/adobe-release-i386-1.0-1.noarch.rpm -y
Installing the plugin
sudo rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-adobe-linux sudo yum install flash-plugin -y
Checking the plugin in Firefox
Type the following text in the Firefox address bar:
about:plugins
Also check the Adobe Flash Player test page
reference: https://ask.fedoraproject.org/en/question/10217/how-to-install-adobe-flash-on-fedora/