When Firefox restarts to apply a new version update and store the
previous session, does that count as "closing Firefox"?
On 5/2/2022 2:36 AM, Hannah Peuckmann wrote:
With the release of Fx102 we intend to remove
network.cookie.lifetimePolicy on desktop.
Bug to remove: Bug 1681493 - [meta] Deprecate and remove
network.cookie.lifetimePolicy
<https://bugzilla.mozilla.org/show_bug.cgi?id=1681493>
For most users, the concept of "session" cookies is very hard to
understand and so we try to make it a little more opaque by calling
the option "Delete cookies and site data when Nightly is closed".
Because this can already be done with sanitization preferences we
effectively end up with two different ways in Firefox to clear cookies
and site data on exit. The difference between them is almost
impossible to understand for anyone who is not a Firefox engineer.
In addition to usability concerns, having "in-memory-only" session
cookie lifetime has meant adding ugly hacks and workarounds for most
of our storage technologies for a long time now (or simply disabling
them in that mode). We had already decided in the past to stop
treating "session lifetime" as equivalent to "in-memory" to avoid
these issues. At that point there's no real reason to have the concept
of session lifetime anymore when all of it can be handled through
sanitization.
We will remove the network.cookie.lifetimePolicy pref that is
controlled by the "Delete cookies and site data when Nightly is
closed"
<https://support.mozilla.org/en-US/kb/clear-cookies-and-site-data-firefox#w_clear-cookies-for-any-website>option.
Starting from Fx102, activating “Delete cookies and site data when
nightly is closed” will trigger the sanitization mechanism, the
feature that is behind the “Clear history when Nightly closes”
<https://support.mozilla.org/en-US/kb/delete-browsing-search-download-history-firefox#w_how-do-i-make-firefox-clear-my-history-automatically>option,
to perform the same data cleaning as network.cookie.lifetimePolicy did.
The UI though will not experience any changes, also, the feature of
being able to declare exceptions to “Delete cookies and site data when
Nightly is closed” through the “Manage exceptions
<https://support.mozilla.org/en-US/kb/clear-cookies-and-site-data-firefox#w_clear-cookies-for-any-website>”
button will still be taken into account when cleaning on shutdown (Bug
1681701 <https://bugzilla.mozilla.org/show_bug.cgi?id=1681701>).
Bug 1681498
<https://bugzilla.mozilla.org/show_bug.cgi?id=1681498> will take care
of migrating all users of the “Delete cookies and site data when
Nightly is closed" option to matching sanitization prefs. According to
telemetry data
<https://sql.telemetry.mozilla.org/queries/85568/source#211908>those
are around 5.5% of the users on Release and 8% of the Nightly users.
Removing the network.cookie.lifetimePolicy will lead to a cleaner code
base and a more convenient, more uniform sanitization process.
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