diff --git a/devilspie2/pip.lua b/devilspie2/pip.lua
new file mode 100644
index 0000000..04540f1
--- /dev/null
+++ b/devilspie2/pip.lua
@@ -0,0 +1,4 @@
+if get_window_name() == "Picture-in-picture" then
+	set_skip_tasklist(true)
+	set_skip_pager(true)
+end
diff --git a/devilspie2/thunderbird.lua b/devilspie2/thunderbird.lua
new file mode 100644
index 0000000..7978ce8
--- /dev/null
+++ b/devilspie2/thunderbird.lua
@@ -0,0 +1,28 @@
+local function opacity(value)
+  os.execute(string.format(
+    "xprop -id %s -f _NET_WM_WINDOW_OPACITY 32c -set _NET_WM_WINDOW_OPACITY 0x%xffffff",
+    get_window_xid(), math.max(math.min(value, 255), 0)
+  ))
+end
+
+local function rep(n, value)
+  if n>0 then return value, rep(n-1, value) end
+end
+
+local margin = { rep(4, 16) }
+if get_application_name():find("Thunderbird$") then
+  print(get_window_name())
+  if get_window_type():find("NORMAL$") then
+    set_window_workspace(get_workspace_count())
+    unmaximize()
+    if get_window_name():find("Thunderbird$") then
+      undecorate_window()
+      set_window_geometry2(1680+margin[1], margin[2], 900-margin[1]-margin[3], 1440-margin[2]-margin[4])
+    else
+      set_window_geometry(1680+margin[1], margin[2], 900-margin[1]-margin[3], 1440-margin[2]-margin[4])
+      set_window_fullscreen(true)
+    end
+    --maximize()
+    opacity(230)
+  end
+end