How to use the latest firefox 13.04 in ubuntu 23.0 and support flash

In ubuntu 13.04, how does one use the latest version of firefox 23.0 and support flash? I saw firefox updated today, so I want to use the latest version. Most examples on the Internet are to download the latest tar-format Firefox package and adobe flash package. decompress the flash package according to the instructions and find that the package still does not work after file migration, my sub-system is 64-bit, so I'm sure other files are missing. Based on previous experiences in installing software in ubuntu, ubuntu's library files are incomplete, but the software in the software center generally automatically installs the associated files, and supplements the library files. Therefore, I thought: I can take a lower version of firefox from the software center and replace its files. Isn't that all right? 1. download firefox from the Software Center this time, find its installation directory/usr/lib/firefox, and rename the firefox folder 2. decompress the latest version of firefox downloaded from the official website, copy the folder firefox to/usr/lib, and check whether flash is supported after it is started. So I copied all the content in the firefox installation folder downloaded from the software center to the decompressed folder on the official website. During cp, be sure not to-f only copies the files that are not included. After this is done, start firefox and finally get it done. Looking back at the features of installing and uninstalling software in the operating system, it is no coincidence that this can be done. It is also the same for linux and Windows ~