diff --git a/nongnu/packages/mozilla.scm b/nongnu/packages/mozilla.scm
index 39e8653..9d70150 100644
--- a/nongnu/packages/mozilla.scm
+++ b/nongnu/packages/mozilla.scm
@@ -81,19 +81,19 @@
 
 ;; Update this id with every firefox update to it's release date.
 ;; It's used for cache validation and therefor can lead to strange bugs.
-(define %firefox-build-id "20210505000000")
+(define %firefox-build-id "20210601000000")
 
 (define-public firefox
   (package
     (name "firefox")
-    (version "88.0.1")
+    (version "89.0")
     (source
      (origin
        (method url-fetch)
        (uri (string-append "https://archive.mozilla.org/pub/firefox/releases/"
                            version "/source/firefox-" version ".source.tar.xz"))
        (sha256
-        (base32 "1k0451ikq65n5lnf2k52nh4f3cnsbiq9vlym3xk9kzi81sp1xpw3"))))
+        (base32 "02m9w3igb1higxnqp318r41khf936jm6szw4bcd0amb4g7axfhyv"))))
     (build-system gnu-build-system)
     (arguments
      `(#:configure-flags
@@ -142,6 +142,11 @@
                   ,@%gnu-build-system-modules)
        #:phases
        (modify-phases %standard-phases
+         ;; See https://gitlab.com/nonguix/nonguix/-/issues/116 for details
+         (add-after 'unpack 'fix-swgl-build.rs
+           (lambda _
+             (substitute* "gfx/wr/swgl/build.rs"
+               ((".flag\\(\"-ffast-math\"\\)") ""))))
          (add-after 'unpack 'fix-preferences
            (lambda* (#:key inputs #:allow-other-keys)
              (let ((port (open-file "browser/app/profile/firefox.js" "a")))
@@ -385,7 +390,7 @@
        ("python" ,python)
        ("python2" ,python-2.7)
        ("rust" ,rust-1.47)
-       ("rust-cbindgen" ,rust-cbindgen-0.16)
+       ("rust-cbindgen" ,rust-cbindgen-0.19)
        ("which" ,which)
        ("yasm" ,yasm)))
     (home-page "https://mozilla.org/firefox/")