diff --git a/Casks/f/firefox@developer-edition.rb b/Casks/f/firefox@developer-edition.rb
index a09b4bee27e1..1ca770c59a34 100644
--- a/Casks/f/firefox@developer-edition.rb
+++ b/Casks/f/firefox@developer-edition.rb
@@ -1,72 +1,72 @@
 cask "firefox@developer-edition" do
-  version "130.0b9"
+  version "131.0b1"
 
   language "ca" do
-    sha256 "cb988cb95827dc09fe02f72a4e849b8cf1615ffd42bae92130c5ea265bdac62e"
+    sha256 "f623210543093da4b7864349b96d1da67ef71fb0f8d80f9c5555b3ff16e474e2"
     "ca"
   end
   language "cs" do
-    sha256 "cb4d31c0095f778a55670a805d9548b8701b8242fea894929cb41e580dc08bdd"
+    sha256 "e1b92554f1eb9718530d816e2417490024867e2e00579ad60b34bdcf49fc6f4f"
     "cs"
   end
   language "de" do
-    sha256 "f6a3a3dd79ef66d68d3c8fb6dc7981bea7b637d7a378eb132882766716450e91"
+    sha256 "1eef096b35e3ce0aa0fee80d1cda8eb37ba927d2805dbecbac2a1c626b092868"
     "de"
   end
   language "en-CA" do
-    sha256 "c55cff19f3f4735a9dd5983fe57d332e4c3560621702fe0b201858b0ba0741f1"
+    sha256 "2689cee8f3ed66e7811f88ccc8b5e5aa62a186b5326616c322c91680da57445e"
     "en-CA"
   end
   language "en-GB" do
-    sha256 "1aed75229b5cb9990027f7473edb9ba9ba082ad35381a28d380ef112f6f1282d"
+    sha256 "6df1bd0281683164bb04bbb59a0524f65e0d245852bdd321a8202c3dafc47914"
     "en-GB"
   end
   language "en", default: true do
-    sha256 "f1adef1c9b6fd3b41154a2f0b3b359442b59b11b89aced548f3c4410f279c2fa"
+    sha256 "ae6919642e5661463df68ae0f8d55ede27a1d6a07f737c56ebf6f0687fe642cc"
     "en-US"
   end
   language "es" do
-    sha256 "85ea30f144c84ef0dca27d8b27e38886f7a2c97da13bc3b008b68b3227d0d46a"
+    sha256 "fa2c5dd19aadb8dcbb2c416f72b4e508f0200f18cf3503fc34c18cfe3bb65173"
     "es-ES"
   end
   language "fr" do
-    sha256 "5861964682dc2caf8aaa40fbb10da54c7ce74074c2d7a6251959bedeb8b40419"
+    sha256 "db8cec56e348f72978cc955502d25698ca15fa552ef43f4aca9689170beba7f4"
     "fr"
   end
   language "it" do
-    sha256 "b5df64248a87d01bf847c021d726593e1255584fc42925ed183dc16bb74e9b2b"
+    sha256 "01b6f4de81d96d43703f87ae2dc5121034f387eb24f96cdf4568725eca49b86e"
     "it"
   end
   language "nl" do
-    sha256 "a5022c72b3da2fa23fceb6492329949e391e0d91efadf50696a86850a3eafa76"
+    sha256 "132304311916c57b3b52224eaac5d162ddcfbb9874ee1f28daa31d6f42f7708e"
     "nl"
   end
   language "ja" do
-    sha256 "374c1b5b94574a181e499e8653febb82c40a5f91d2823522ab31cf92c8004407"
+    sha256 "f1c3553949e439cb0f0e01af3424ca7e0a02005035ee985f80ce8ae2a9876627"
     "ja-JP-mac"
   end
   language "pt-BR" do
-    sha256 "5801fa91e18e1efb92979d63a30d3a95b1f1855e81830297cf90c1df5f673ce2"
+    sha256 "f39354e205d7c9019e7c52bc60760a113126622cbf880d5eb9abed3ce025e190"
     "pt-BR"
   end
   language "ko" do
-    sha256 "21d7bcb917f48badad74e1fd159c97c9e7d5363187537326558f4c113ecb7cc2"
+    sha256 "7fd9a38848bcafd7e57a460d2e651c599df3355f00069e34bfc52ce76749a27b"
     "ko"
   end
   language "ru" do
-    sha256 "54a83a7a29d7844f849e0cf40f49565b490005661447212ce94ae9df9d36e42c"
+    sha256 "7db4f88c2f65d7f9112d67b1d512f49b19268a8dbc2aa81bb989f3d9af636537"
     "ru"
   end
   language "uk" do
-    sha256 "20f7a9b31c2dc6705953787e9bf2383f5303c5bc9e65df1653416d1bf9445764"
+    sha256 "0c38d6772bc4244f073ac466622b266239e49ec9d29d7c344e4955ae7b6934a4"
     "uk"
   end
   language "zh-TW" do
-    sha256 "2ed41bd31c1f9d31cfa930de2c5b42f24b082531deea6602c7a7cd151b7ac3e4"
+    sha256 "8386af9d9fc15b51652b1789f5fe0912bb8d4e0691930dd1479bc20c9e78565d"
     "zh-TW"
   end
   language "zh" do
-    sha256 "8d3fd01998b85eaf21d95f3f071c3a465c221615e1d223ae7bbea515bd2214b8"
+    sha256 "50ec551cbd79fc17075f8a03b9ee75d95c90ed16e150008a4cb3ca947e5cb237"
     "zh-CN"
   end