302267 - about:config settings (e.g. proxy settings) should be per-tab, per-window, per-session, or global

Status: RESOLVED DUPLICATE of bug 302150

(Firefox :: Settings UI, enhancement)

Description

[t t]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.10) Gecko/20050720 Firefox/1.0.6
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.10) Gecko/20050720 Firefox/1.0.6

many people use more than one proxy, such as one for work and one for home. 
they should be able to keep all of their settings, chrome, user css, etc. but
still have 2 windows open using 2 different sets of proxy settings.

the generalization of this request is to allow settings to be per-tab,
per-window, per-session, or global.  this is similar to buffer-local variables
in emacs.  it would be a clean design.

this is in keeping with a general need for users to be able to selectively
create and copy profiles.  if your profile is perfect but you want one exactly
the same as it except for a single setting, it should be easy.  likewise, you
should be able to choose which parts of an existing profile to keep and which to
copy when you create a new one, without manual copying or editing of files. 
allowing settings with these specificities is part of a general ability for the
user to control ff.

Reproducible: Always

Steps to Reproduce:
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Comment 1

[Jaime Mitchell (use [e-mail] for email)]

*** Bug 302266 has been marked as a duplicate of this bug. ***

Comment 2

[Jaime Mitchell (use [e-mail] for email)]

Do not intentionally file duplicate bugs.

*** This bug has been marked as a duplicate of 302150 ***

Comment 3

[t t]

hmm, i lost all my changes and the bug lost other people's changes also.  some
internal error.  this is a test.