Mention Debian's experimental repo.

FAQ.asciidoc

@@ -112,10 +112,10 @@ Experiencing segfaults (crashes) on Debian systems.::
 
 Segfaults on Facebook, Medium, Amazon, ...::
     If you are on a Debian or Ubuntu based system, you might experience some crashes
-    visting these sites. This is caused by a known bug in Qt which has been
+    visting these sites. This is caused by various bugs in Qt which have been
     fixed in Qt 5.4. However Debian and Ubuntu are slow to adopt or upgrade
-    some packages. There is currently no easy way to manually upgrade to Qt
+    some packages. On Debian Jessie, it's recommended to use the experimental
-    5.4 on those systems.
+    repos as described in https://github.com/The-Compiler/qutebrowser/blob/master/INSTALL.asciidoc#on-debian--ubuntu[INSTALL].
 +
 Since Ubuntu Trusty (using Qt 5.2.1),
 https://bugreports.qt.io/browse/QTBUG-42417?jql=component%20%3D%20WebKit%20and%20resolution%20%3D%20Done%20and%20fixVersion%20in%20(5.3.0%2C%20%225.3.0%20Alpha%22%2C%20%225.3.0%20Beta1%22%2C%20%225.3.0%20RC1%22%2C%205.3.1%2C%205.3.2%2C%205.4.0%2C%20%225.4.0%20Alpha%22%2C%20%225.4.0%20Beta%22%2C%20%225.4.0%20RC%22)%20and%20priority%20in%20(%22P2%3A%20Important%22%2C%20%22P1%3A%20Critical%22%2C%20%22P0%3A%20Blocker%22)[over

INSTALL.asciidoc

@@ -12,6 +12,39 @@ qutebrowser should run on these systems:
 
 Install the dependencies via apt-get:
 
+[NOTE]
+==========================
+On Debian, it's recommended to install the Qt packages from the
+https://wiki.debian.org/DebianExperimental[experimental] repository as those
+are a much newer version of Qt which is more stable.
+
+Add the following line to your `/etc/apt/sources.list`:
+
+----
+deb http://ftp.debian.org/debian experimental main
+----
+
+Then install the packages like this:
+
+----
+# apt-get update
+# apt-get install -t experimental python3-pyqt5 python3-pyqt5.qtwebkit
+# apt-get install python-tox
+----
+
+It's also recommended to pin those packages to receive updates by creating a
+file `/etc/apt/preferences.d/qutebrowser` with the following contents:
+
+----
+Package: python3-pyqt5* libqt5*
+Pin: release a=experimental
+Pin-Priority: 800
+----
+==========================
+
+For distributions other than Debian or if you prefer to not use the
+experimental repo:
+
 ----
 # apt-get install python3-pyqt5 python3-pyqt5.qtwebkit python-tox
 ----