Added firefox hack for flash

README.md

@@ -12,6 +12,7 @@
 * [Linux](./linux/README.md)
     * [Archlinux](./linux/arch/README.md)
         * [Installation instructions for UEFI + GPT](./linux/arch/installation.md)
+    * [Firefox](./linux/firefox.md)
     * [libvirt](./linux/libvirt.md)
 	* [Shell commands](./linux/shell_commands.md)
     * [udev](./linux/udev.md)

linux/firefox.md

@@ -0,0 +1,13 @@
+# Firefox
+
+## Enable use of flash player plugin
+
+**WARNING**: You are creating a Firefox browser which can use **deprecated**, **unsafe** plugins like Flash or Java. Please keep in mind to only access safe webpages with it. **You have been warned!**
+
+1. Download and install an older version of Firefox, e.g. version 51
+2. Install flash plugin
+3. Create a separate user profile for this installation
+4. Symlink `libflashplugin.so` to `<user-profile-dir>/plugins/`
+5. Start Firefox with new profile like this: `</firefox-path>/firefox --profile <profile-path> --no-remote`
+    * Use `--no-remote` to create a new window in a new session
+    * Otherwise an already open Firefox would spawn a new window