Firefox: where do i put a plugin library file?
 

Hello,

I am using linux (Debian). i have a file i have kept, since a few years
ago, to use in pages which need flash plugin. The file name is
libflashplayer.so. I used it, in a machine that is not around me
anymore, and now i want to have it again. Where do i put this file to
make pages which have SWF content work?

Two options: can i put it somewhere inside my user profile? (people here
should know if this is possible, i guess) Or must i put in in a system
folder, to work? If more than one, which ones?

I don't have Debian, but I assume this advice will work
https://wiki.debian.org/FlashPlayer/#Firefox

I would start here: https://support.mozilla.org/en-US/questions/1030381

libflashplayer.so is part of Adobe Flash. Download the Flash *.tar.gz file, extract it, then, as root, copy libflashplayer.so to the Mozilla plugins directory (usually /usr/lib[64]/mozilla/plugins).

Note that Adobe will end support for Flash at the end of this year.

The flash plugin must be installed separatedly for each browser we have? This is so strange.

I do not care. I will continue to use it to open the SWF files i have. I just stopped using it for sometime, but now i will be using them with a fair frequency.

See post #4: normally the directory /usr/lib{,64}/mozilla/plugins will work for all mozilla browsers
Do not know if that works for chrome/chromium etc too.
But anyway chrome/chromium needs a pepper (PPAPI) plugin, not a NPAPI (Netscape Plugin API) version of flash.