Where are temporary files located in Mozilla Firefox?

Question

Mozilla Firefox

Good afternoon!
I would like to know how to override the storage location of temporary files, or rather, cookies, in the MF portable browser. Just do not rush to answer that the cookies are in the cache, you just need to type about:cache in the address bar, and we will immediately see everything. Experience has shown that this is not the case.
That's where the question came from. There are two portable versions of Mozilla Firefox. It was conceived in such a way as to configure them to work with two different portals (one on one browser, the other on another), so that the work does not overlap, i.e., let's say, they are logged into an account on one browser, and the second "does not know" about this authorizations; also, if you clear cookies on one MF, all authorizations should remain on the second. This is what doesn't happen.
When typing about:cache, folders that are "inside" the directory of the corresponding browser are displayed, that is, if cookies were stored only in the cache, then when clearing cookies in one browser, the other would not notice this, and all authorizations in it would be saved .
But everything happens as if the place where cookies are stored is common for browsers, i.e. you clear cookies in one, then in the second they are cleared, authorizations on the sites are reset.
It has been noticed that when Mozilla Firefox portable is running, no matter what about:cache shows (all cache folders are inside the MF directory itself), something is still written to the C:\Users\{Computer username}\AppData\ folder local\temp. We tried to study all the lines in about:config, it is not indicated anywhere.
Please tell me how to separate the work of two copies of Mozilla Firefox portable so that they do not see each other's cookies, but write and delete only their own?
Thank you.

Answer 1

Try building your portable. For example, using vmware thinapp. The latest version 5.2.3 supports a Firefox 50.1 port. Just did the assembly last week, everything works fine. Temporary files and cookies are written to the sandbox.

Answer 2

you can run and not portable, at least 10 profiles at once, if the hardware takes out ㋛
firefox -no-remote -r "profile name"
there is some info, including about portable