diff --git a/pkgs/applications/networking/browsers/floorp/default.nix b/pkgs/applications/networking/browsers/floorp/default.nix
index 7b015bafbb0fa6c..b29d1717905b898 100644
--- a/pkgs/applications/networking/browsers/floorp/default.nix
+++ b/pkgs/applications/networking/browsers/floorp/default.nix
@@ -3,11 +3,12 @@
 , fetchFromGitHub
 , buildMozillaMach
 , nixosTests
+, python311
 }:
 
 ((buildMozillaMach rec {
   pname = "floorp";
-  packageVersion = "11.13.2";
+  packageVersion = "11.16.0";
   applicationName = "Floorp";
   binaryName = "floorp";
   branding = "browser/branding/official";
@@ -15,14 +16,14 @@
   allowAddonSideload = true;
 
   # Must match the contents of `browser/config/version.txt` in the source tree
-  version = "115.12.0";
+  version = "115.15.0";
 
   src = fetchFromGitHub {
     owner = "Floorp-Projects";
     repo = "Floorp";
     fetchSubmodules = true;
     rev = "v${packageVersion}";
-    hash = "sha256-sFtGtxk3vdR5JoZb1yiITybIfGmOYzKLb9NtbhWjBt8=";
+    hash = "sha256-bmB88EIc5S/EYZXiQ5Dc+LjcGB4dlwKRBBV0T0ln88E=";
   };
 
   extraConfigureFlags = [
@@ -31,6 +32,15 @@
     "--with-unsigned-addon-scopes=app,system"
   ];
 
+  extraPostPatch = ''
+    # Fix .desktop files for PWAs generated by Floorp
+    # The executable path returned by Services.dirsvc.get() is absolute and
+    # thus is the full /nix/store/[..] path. To avoid breaking PWAs with each
+    # update, rely on `floorp` being in $PATH, as before.
+    substituteInPlace floorp/browser/base/content/modules/ssb/LinuxSupport.mjs \
+      --replace-fail 'Services.dirsvc.get("XREExeF",Ci.nsIFile).path' '"floorp"'
+  '';
+
   updateScript = ./update.sh;
 
   meta = {
@@ -54,6 +64,7 @@
   enableOfficialBranding = false;
   googleAPISupport = true;
   mlsAPISupport = true;
+  python3 = python311;
 }).overrideAttrs (prev: {
   MOZ_DATA_REPORTING = "";
   MOZ_TELEMETRY_REPORTING = "";