How to Install Flash Plugin for the Firefox Browser on the RPi 3 (may work for RP2 & 1 also)
Is your Firefox browser, missing the flash plugin on your Raspberry Pi 3? Here is how you can install Firefox (if you haven’t already) and the flash plugin, easily, without using the terminal!
Instead of going through the terminal and typing in, “sudo apt-get install yada yada yada”, to install software, you can go through the Add/Remove Software, found under Preferences in the Menu, on the taskbar!
To find the software you are looking for, type it in search box in the top left corner, or click on each category below the box and scroll through the selections. You may have to play around with different wording to see if it may be available under another name. Once you find the software you want, you simply click on it to place a check mark in the box, then click Apply and it will then be installed. Once the software is installed, you click Ok to complete it and close the box.
I found and installed the Firefox browser from there by typing in the search box at the top, “Iceweasel”. It came up as Firefox. It actually installs two Firefox browsers for some reason. Firefox ESR (Extended Support Release) and Firefox Iceweasel ESR.
You can also remove software in much the same way. Just search for the name again. If it is already installed on your Raspberry Pi, you will see an open gold or yellow box and a box next to it that is checked (if it’s not already installed, it will be a closed box and faded with no check mark). Just click on it to un-check the box and highlight it, then click apply, and it will be removed. You may also have to un-check things that were installed with it, to completely remove it from your Pi. Then click Ok, to complete it and close.
To install a flash plugin for Firebox, you can use Gnash. Gnash is a version of flash, that is required to play media files like swf videos, and many online games. Type Gnash in the box and hit enter. It should show up in the list and will say something like, “Gnash plugin for Firefox and its derivatives (i.e. iceweasel, etc)”. Just click on it to place a check in the box. Then click Apply, and it will be installed. Once done, click Ok to complete it and close the box.
To check to see if the plugin is installed and enabled, open your Firefox browser and then click on the menu box in the top right corner next to the address bar. Click on Add-ons (shows a puzzle piece icon). Then click plugins on the left after the page loads. You should see it listed. To make sure it’s working, you can visit this site that has lots of flash games for kids, and try playing a game or too. It’s fun!