diff --git a/.config/guix/manifests/desktop-misc.scm b/.config/guix/manifests/desktop-misc.scm
index 591a085..99feaa7 100644
--- a/.config/guix/manifests/desktop-misc.scm
+++ b/.config/guix/manifests/desktop-misc.scm
@@ -19,4 +19,6 @@
    "ponymix"
    "light"
    "arandr"
-   "xprop"))
+   "xprop"
+   "xss-lock"
+   "xinit"))
diff --git a/.config/mimeapps.list b/.config/mimeapps.list
new file mode 100644
index 0000000..9aa396e
--- /dev/null
+++ b/.config/mimeapps.list
@@ -0,0 +1,13 @@
+[Default Applications]
+text/html=firefox.desktop
+x-scheme-handler/http=firefox.desktop
+x-scheme-handler/https=firefox.desktop
+x-scheme-handler/about=firefox.desktop
+x-scheme-handler/unknown=firefox.desktop
+x-scheme-handler/tg=userapp-Telegram Desktop-7PVWF1.desktop
+image/png=feh.desktop
+image/jpg=feh.desktop
+image/jpeg=feh.desktop
+
+[Added Associations]
+x-scheme-handler/tg=userapp-Telegram Desktop-7PVWF1.desktop;
diff --git a/Desktop.org b/Desktop.org
index 364fbc6..8f971df 100644
--- a/Desktop.org
+++ b/Desktop.org
@@ -236,6 +236,23 @@ Xft/Antialias 1
 Xft/Hinting 0
 Xft/HintStyle "hintnone"
 #+end_src
+** MIME
+Setting the default MIME types
+#+begin_src conf-unix :tangle ~/.config/mimeapps.list
+[Default Applications]
+text/html=firefox.desktop
+x-scheme-handler/http=firefox.desktop
+x-scheme-handler/https=firefox.desktop
+x-scheme-handler/about=firefox.desktop
+x-scheme-handler/unknown=firefox.desktop
+x-scheme-handler/tg=userapp-Telegram Desktop-7PVWF1.desktop
+image/png=feh.desktop
+image/jpg=feh.desktop
+image/jpeg=feh.desktop
+
+[Added Associations]
+x-scheme-handler/tg=userapp-Telegram Desktop-7PVWF1.desktop;
+#+end_src
 ** Device-specific settings
 | Guix dependency | Description                                |
 |-----------------+--------------------------------------------|