diff --git a/contributors/rdoursenaud.md b/contributors/rdoursenaud.md
new file mode 100644
index 00000000..c1da3144
--- /dev/null
+++ b/contributors/rdoursenaud.md
@@ -0,0 +1,9 @@
+2017-04-07
+
+I hereby agree to the terms of the "Markdown Here Individual Contributor License Agreement", with SHA256 checksum b51a6143fbb3ee4ab3786b2877d7ff93a0d36df5c1603e45e24c5734b774ff65.
+
+I furthermore declare that I am authorized and able to make this agreement and sign this declaration.
+
+Signed,
+
+Raphaël Doursenaud https://github.com/rdoursenaud
diff --git a/src/manifest.json b/src/manifest.json
index f3c5af49..32578de6 100644
--- a/src/manifest.json
+++ b/src/manifest.json
@@ -17,6 +17,7 @@
   "content_scripts": [
     {
       "matches": ["http://*/*", "https://*/*"],
+      "exclude_matches": ["https://mail.google.com/mail/mu/background*"],
       "js": [
         "common/utils.js",
         "common/common-logic.js",