1034842 - Firefox should preload favicons for default protocol services it ships

Status: REOPENED

(Firefox :: Settings UI, defect, P3)

Description

[jenda.uoe63u]

Firefox automatically downloads favicons for some predefined web services when browsing Preferences. Additionally, these requests leak cookies. This happens even with Private browsing windows and I haven't found a way to stop it.

How to reproduce:
 1) Open Edit -> Preferences
 2) Click Applications
 3) Click "irc", "ircs" or "mailto"
 4) Firefox makes requests to mail.google.com, compose.mail.yahoo.com, ssl.gstatic.com and www.mibbit.com happily sending cookies too.
 5) If Applications tab is left selected, Firefox does this again immediately after cleaning cache, restart and opening Preferences

Setting gecko.handlerService.schemes.irc.0.uriTemplate to localhost does not help and there are no other occurrences of keywords like "mibbit" in about:config.

Reference: bug #480826

Comment 1

[:aceman]

Yeah, cookies should not be sent as the user is not voluntarily visiting the site.
The logic for fetching the icons probably is to get an up to date icon as the site itself is using so that the user recognizes it in the list.

Comment 2

[Michal Stanke (Mozilla.cz) [:mstanke][:MikkCZ]]

What's the current status of this, please? Is this confirmed and still existing issue?

Comment 3

[Michal Stanke (Mozilla.cz) [:mstanke][:MikkCZ]]

As it is Mibbit and e-mail services, I assume it happens in the Applications panel when it tries to fetch the favicons of the predefined providers. So the lists of servers will depend on the Firefox localization (or about:config preferences).

Comment 4

[Firefox Bug Husbandry Bot]

2019-03-06

This bug is part of a group of bugs which have had an open needinfo for at least 12 weeks.

The request for information has not been answered, and we can't move forward on the bug so we are closing it.

If the defect is still present, please reopen this bug with an updated report.