fixup! Base Browser strings

Bug 42347: Add a notification for dropped OS version support.

toolkit/locales/en-US/toolkit/global/base-browser.ftl

@@ -166,3 +166,21 @@ security-level-summary-custom = Your custom browser preferences have resulted in
 # Button to undo custom changes to the security level and place the user in one of the standard security levels.
 # Shown in the security level panel and settings.
 security-level-restore-defaults-button = Restore defaults
+
+## Notification for dropped operating system support.
+
+# "{ -brand-short-name }" will be replaced with the localized name of the browser, e.g. "Tor Browser".
+# "14.0" refers to the browser versions number: Tor Browser 14.0.
+# "macOS" is a brand name, and 10.15 is the macOS version number.
+dropped-support-notification-macos-version-less-than-10-15 = The next major version of { -brand-short-name } (14.0) will no longer support this version of macOS. Please upgrade to macOS 10.15 or later by October 1st 2024 to continue receiving important security updates.
+# "{ -brand-short-name }" will be replaced with the localized name of the browser, e.g. "Tor Browser".
+# "macOS" is a brand name, and 10.15 is the macOS version number.
+dropped-support-notification-macos-version-less-than-10-15-expired = { -brand-short-name } no longer supports this version of macOS. Please upgrade to macOS 10.15 or later to continue receiving important security updates.
+# "{ -brand-short-name }" will be replaced with the localized name of the browser, e.g. "Tor Browser".
+# "14.0" refers to the browser versions number: Tor Browser 14.0.
+# "Windows" is a brand name, and "Windows 10" is the version.
+dropped-support-notification-win-os-version-less-than-10 = The next major version of { -brand-short-name } (14.0) will no longer support this version of Windows. Please upgrade to Windows 10 or later by October 1st 2024 to continue receiving important security updates.
+# "{ -brand-short-name }" will be replaced with the localized name of the browser, e.g. "Tor Browser".
+# "Windows" is a brand name, and "Windows 10" is the version.
+dropped-support-notification-win-os-version-less-than-10-expired = { -brand-short-name } no longer supports this version of Windows. Please upgrade to Windows 10 or later to continue receiving important security updates.
+dropped-support-notification-dismiss-button = Got it