diff --git a/dist/arch/gnome/PKGBUILD b/dist/arch/gnome/PKGBUILD
index 97e8ada..579cc4d 100644
--- a/dist/arch/gnome/PKGBUILD
+++ b/dist/arch/gnome/PKGBUILD
@@ -12,7 +12,7 @@ depends=(
   'qt5-base'
   'gnome-shell-extension-appindicator'
   'thunderbird>=68'
-  'thunderbird<102'
+  'thunderbird<103'
 )
 makedepends=(
   'git'
diff --git a/dist/arch/kde/PKGBUILD b/dist/arch/kde/PKGBUILD
index 605b6c0..6509c4b 100644
--- a/dist/arch/kde/PKGBUILD
+++ b/dist/arch/kde/PKGBUILD
@@ -12,7 +12,7 @@ depends=(
   'qt5-base'
   'knotifications'
   'thunderbird>=68'
-  'thunderbird<102'
+  'thunderbird<103'
 )
 makedepends=(
   'git'
diff --git a/dist/arch/minimal/PKGBUILD b/dist/arch/minimal/PKGBUILD
index 5de9684..2626d46 100644
--- a/dist/arch/minimal/PKGBUILD
+++ b/dist/arch/minimal/PKGBUILD
@@ -11,7 +11,7 @@ license=(MPL-2.0)
 depends=(
   'qt5-base'
   'thunderbird>=68'
-  'thunderbird<102'
+  'thunderbird<103'
 )
 makedepends=(
   'git'
diff --git a/dist/deb/gnome/debian.control b/dist/deb/gnome/debian.control
index b810cef..e62b3cc 100644
--- a/dist/deb/gnome/debian.control
+++ b/dist/deb/gnome/debian.control
@@ -6,7 +6,7 @@ Build-Depends: debhelper (>= 4.1.16), zip, g++, libx11-dev, qt5-qmake, qtbase5-d
 
 Package: systray-x-gnome
 Architecture: any
-Depends: ${shlibs:Depends}, gnome-shell-extension-appindicator, thunderbird (>= 1:68), thunderbird (< 1:102)
+Depends: ${shlibs:Depends}, gnome-shell-extension-appindicator, thunderbird (>= 1:68), thunderbird (< 1:103)
 Description: SysTray-X is a system tray extension for Thunderbird 68+ (GNOME).
  This version is optimized for the GNOME desktop.
  The add-on uses the WebExtension API's to control an external system
diff --git a/dist/deb/kde/debian.control b/dist/deb/kde/debian.control
index 2d1e8a3..05d5367 100644
--- a/dist/deb/kde/debian.control
+++ b/dist/deb/kde/debian.control
@@ -6,7 +6,7 @@ Build-Depends: debhelper (>= 4.1.16), zip, g++, libx11-dev, qt5-qmake, qtbase5-d
 
 Package: systray-x
 Architecture: any
-Depends: ${shlibs:Depends}, thunderbird (>= 1:68), thunderbird (< 1:102)
+Depends: ${shlibs:Depends}, thunderbird (>= 1:68), thunderbird (< 1:103)
 Description: SysTray-X is a system tray extension for Thunderbird 68+ (KDE).
  This version is optimized for the KDE desktop.
  The add-on uses the WebExtension API's to control an external system
diff --git a/dist/deb/minimal/debian.control b/dist/deb/minimal/debian.control
index 3215331..fbde601 100644
--- a/dist/deb/minimal/debian.control
+++ b/dist/deb/minimal/debian.control
@@ -6,7 +6,7 @@ Build-Depends: debhelper (>= 4.1.16), zip, g++, libx11-dev, qt5-qmake, qtbase5-d
 
 Package: systray-x-minimal
 Architecture: any
-Depends: ${shlibs:Depends}, thunderbird (>= 1:68), thunderbird (< 1:102)
+Depends: ${shlibs:Depends}, thunderbird (>= 1:68), thunderbird (< 1:103)
 Description: SysTray-X is a system tray extension for Thunderbird 68+ (non-GNOME,non-KDE).
  This version is for non-KDE and non-GNOME desktops.
  The add-on uses the WebExtension API's to control an external system
diff --git a/dist/rpm/gnome/systray-x-gnome.spec b/dist/rpm/gnome/systray-x-gnome.spec
index b538e14..9c002b9 100644
--- a/dist/rpm/gnome/systray-x-gnome.spec
+++ b/dist/rpm/gnome/systray-x-gnome.spec
@@ -33,10 +33,10 @@ BuildRequires:  pkgconfig(x11)
 Requires:       gnome-shell-extension-appindicator
 %if 0%{?fedora_version} || 0%{?centos_version}
 Requires:       thunderbird >= 68
-Requires:       thunderbird < 102
+Requires:       thunderbird < 103
 %else
 Requires:       MozillaThunderbird >= 68
-Requires:       MozillaThunderbird < 102
+Requires:       MozillaThunderbird < 103
 %endif
 
 %description
diff --git a/dist/rpm/kde/systray-x.spec b/dist/rpm/kde/systray-x.spec
index 4b9c2a9..a7c10b5 100644
--- a/dist/rpm/kde/systray-x.spec
+++ b/dist/rpm/kde/systray-x.spec
@@ -34,12 +34,12 @@ BuildRequires:  pkgconfig(x11)
 BuildRequires:  kf5-knotifications-devel
 Requires:       kf5-knotifications
 Requires:       thunderbird >= 68
-Requires:       thunderbird < 102
+Requires:       thunderbird < 103
 %else
 BuildRequires:  knotifications-devel
 Requires:       libKF5Notifications5
 Requires:       MozillaThunderbird >= 68
-Requires:       MozillaThunderbird < 102
+Requires:       MozillaThunderbird < 103
 %endif
 
 %description
diff --git a/dist/rpm/minimal/systray-x-minimal.spec b/dist/rpm/minimal/systray-x-minimal.spec
index 1abd4fd..d79a123 100644
--- a/dist/rpm/minimal/systray-x-minimal.spec
+++ b/dist/rpm/minimal/systray-x-minimal.spec
@@ -32,10 +32,10 @@ BuildRequires:  pkgconfig(Qt5DBus)
 BuildRequires:  pkgconfig(x11)
 %if 0%{?fedora_version} || 0%{?centos_version}
 Requires:       thunderbird >= 68
-Requires:       thunderbird < 102
+Requires:       thunderbird < 103
 %else
 Requires:       MozillaThunderbird >= 68
-Requires:       MozillaThunderbird < 102
+Requires:       MozillaThunderbird < 103
 %endif
 
 %description
diff --git a/webext/background.html b/webext/background.html
index c133891..4c357a7 100644
--- a/webext/background.html
+++ b/webext/background.html
@@ -1,3 +1,4 @@
+<!DOCTYPE html>
 <html>
   <head>
     <title>SysTray-X</title>
diff --git a/webext/manifest.json b/webext/manifest.json
index a3e1911..76a7f9f 100644
--- a/webext/manifest.json
+++ b/webext/manifest.json
@@ -10,7 +10,7 @@
     "gecko": {
       "id": "systray-x@Ximi1970",
       "strict_min_version": "68.0",
-      "strict_max_version": "101.*"
+      "strict_max_version": "102.*"
     }
   },
 
diff --git a/webext/options.html b/webext/options.html
index 8585f3d..b0c80c2 100644
--- a/webext/options.html
+++ b/webext/options.html
@@ -1,3 +1,4 @@
+<!DOCTYPE html>
 <html>
   <head>
     <title>__MSG_preferences__</title>