diff --git a/INSTALL.md b/INSTALL.md
index 16104b679..006467a4c 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -34,18 +34,20 @@
 
 ## Dependencies
 
-| Name          | Version     | Modules                                                  |
-|---------------|-------------|----------------------------------------------------------|
-| [Qt]          | >= 5.5.0    | concurrent, core, gui, network, opengl, svg, widget, xml |
-| [GCC]/[MinGW] | >= 4.8      | C++11 enabled                                            |
-| [toxcore]     | >= 0.2.10   | core, av                                                 |
-| [FFmpeg]      | >= 2.6.0    | avformat, avdevice, avcodec, avutil, swscale             |
-| [CMake]       | >= 2.8.11   |                                                          |
-| [OpenAL Soft] | >= 1.16.0   |                                                          |
-| [qrencode]    | >= 3.0.3    |                                                          |
-| [sqlcipher]   | >= 3.2.0    |                                                          |
-| [pkg-config]  | >= 0.28     |                                                          |
-| [snorenotify] | >= 0.7.0    | optional dependency                                      |
+| Name                     | Version     | Modules                                                  |
+|--------------------------|-------------|----------------------------------------------------------|
+| [Qt]                     | >= 5.5.0    | concurrent, core, gui, network, opengl, svg, widget, xml |
+| [GCC]/[MinGW]            | >= 4.8      | C++11 enabled                                            |
+| [toxcore]                | >= 0.2.10   | core, av                                                 |
+| [FFmpeg]                 | >= 2.6.0    | avformat, avdevice, avcodec, avutil, swscale             |
+| [CMake]                  | >= 2.8.11   |                                                          |
+| [OpenAL Soft]            | >= 1.16.0   |                                                          |
+| [qrencode]               | >= 3.0.3    |                                                          |
+| [sqlcipher]              | >= 3.2.0    |                                                          |
+| [pkg-config]             | >= 0.28     |                                                          |
+| [snorenotify]            | >= 0.7.0    | optional dependency                                      |
+| [toxext]                 | >= 0.0.1    |                                                          |
+| [tox_extension_messages] | >= 0.0.1    |                                                          |
 
 ## Optional dependencies
 
@@ -424,6 +426,30 @@ echo '/usr/local/lib/' | sudo tee -a /etc/ld.so.conf.d/locallib.conf
 sudo ldconfig
 ```
 
+### Compile extensions
+
+qTox uses the toxext library and some of the extensions that go with it.
+
+You will likely have to compile these yourself
+
+```bash
+git clone https://github.com/toxext/toxext.git toxext
+cd toxext
+git checkout v0.0.2
+cmake .
+make -j$(nproc)
+sudo make install
+```
+
+```bash
+git clone https://github.com/toxext/tox_extension_messages.git tox_extension_messages
+cd tox_extension_messages
+git checkout v0.0.2
+cmake .
+make -j$(nproc)
+sudo make install
+```
+
 ### Compile qTox
 
 **Make sure that all the dependencies are installed.**  If you experience
@@ -756,3 +782,5 @@ Switches:
 [toxcore]: https://github.com/TokTok/c-toxcore/
 [sonnet]: https://github.com/KDE/sonnet
 [snorenotify]: https://techbase.kde.org/Projects/Snorenotify
+[toxext]: https://github.com/toxext/toxext
+[tox_extension_messages]: https://github.com/toxext/tox_extension_messages
diff --git a/doc/user_manual_en.md b/doc/user_manual_en.md
index dc6c863c2..46a115dc3 100644
--- a/doc/user_manual_en.md
+++ b/doc/user_manual_en.md
@@ -489,3 +489,11 @@ public key, and which changes on every start of a client, so it's best to use a
 [ToxMe service]: #register-on-toxme
 [user profile]: #user-profile
 [profile corner]: #profile-corner
+
+# Extensions
+
+qTox supports extra features through the use of extensions to the tox protocol. Not all contacts are going to support these extensions.
+
+For most cases you won't have to do anything, but you may wonder why behavior of chats is different for some friends. There is a puzzle piece icon to the left of your contact's name in the top of a chat. If it's green that means that they support all the features qTox cares about. If it's yellow it means some of the features are supported. If it's red it means that they don't support any extensions.
+
+You can hover over the icon to see which extensions they support. qTox should dynamically enable/disable features based on the extension set of your friend.