This release fixes [many security issues](
https://tails.boum.org/security/Numerous_security_holes_in_2.4/index.en.html) and users should upgrade as soon as possible.
# Changes
## New features
## Upgrades and changes
* Update _Tor Browser_ to 6.0.3, based on _Firefox_ 45.3.
* Upgrade _Icedove_ to 45.1. ([#11530](
https://labs.riseup.net/code/issues/11530))
## Fixed problems
* The automatic account configuration of _Icedove_ used to freeze when connecting to some email providers. ([#11486](
https://labs.riseup.net/code/issues/11486))
* In some cases sending an email with _Icedove_ used to result in the error: "The message could not be sent using Outgoing server (SMTP) mail.riseup.net for an unknown reason." ([#10933](
https://labs.riseup.net/code/issues/10933))
* A spurious error message used to sometimes appear when creating an account in _Icedove_ and providing its password. ([#11550](
https://labs.riseup.net/code/issues/11550))
* Fix some time synchronization problems, by replacing obsolete and unreliable servers, and decreasing a timeout. ([#11577](
https://labs.riseup.net/code/issues/11577))
* [KVM virtual machines](
https://tails.boum.org/doc/advanced_topics/virtualization/virt-manager/index.en.html) with QXL video: vastly improve graphics performance and fix visual artifacts in _Tor Browser_. ([#11500](
https://labs.riseup.net/code/issues/11500), [#11489](
https://labs.riseup.net/code/issues/11489))
For more details, read our [changelog](
https://git-tails.immerda.ch/tails/plain/debian/changelog).
# Known issues
See the list of [long-standing issues](
https://tails.boum.org/support/known_issues/index.en.html).
# Get Tails 2.5
* To install, follow our [installation instructions](
https://tails.boum.org/install/index.en.html).
* To upgrade, an automatic upgrade is available from 2.4 to 2.5.
If you cannot do an automatic upgrade or if you fail to start after an automatic upgrade, please try to do a [manual upgrade](
https://tails.boum.org/upgrade/index.en.html).
* [Download Tails 2.5.](
https://tails.boum.org/install/download/index.en.html)
# What's coming up?
Tails 2.6 is [scheduled](
https://tails.boum.org/contribute/calendar/) for September 13.
Have a look at our [roadmap](
https://labs.riseup.net/code/projects/tails/roadmap) to see where we are heading to.
We need your help and there are many ways to [contribute to Tails](
https://tails.boum.org/contribute/index.en.html) ([donating](
https://tails.boum.org/contribute/how/donate/index.en.html) is only one of them). Come [talk to us](
https://tails.boum.org/about/contact/index.en.html#tails-dev)!
URL:
https://tails.boum.org/news/version_2.5/index.en.html
