meta: Switch back to librewolf

After using firefox for a while, a deal-breaker for me was that the
regular version is impossible load custom extensions for without signing
them before-hand.

Although it's possible to load extensions through about:debugging every
time the web browser is started, it's significantly easier for me to
simply use librewolf and not worry about it. Additionally, I can now
leverage the many additional features librewolf has compared to firefox,
and now no longer have to worry about "configuring firefox" after
installing it.

git/.gitconfig

@@ -27,7 +27,7 @@
     cmd = kitty kitty +kitten diff $LOCAL $REMOTE
 
 [web]
-    browser = qutebrowser
+    browser = librewolf
 
 [push]
     default = simple

kitty/.config/kitty/kitty.conf

@@ -71,7 +71,7 @@ initial_window_height 40c
 close_on_child_death yes
 
 # Open URLs with the browser below
-open_url_with qutebrowser
+open_url_with librewolf
 
 # =============================
 # ========== Spacing ==========