Pontoon: Update Spanish (Mexico) (es-MX) localization of Firefox Scre…

…enshots

Localization authors:
- eduardo <eduardo@esperanto.org.uy>

locales/es-MX/webextension.properties

@@ -16,6 +16,9 @@ notificationLinkCopiedTitle = Enlace copiado
 # modifier key used in the shortcut (do not translate it): for example, Ctrl-V
 # on Windows systems.
 notificationLinkCopiedDetails = El enlace que has capturado ha sido copiado al portapapeles. Presiona {meta_key}-V para pegar.
+# This is displayed as a warning when a Full Page save will be cropped.
+# {pixels} will be a number like 5000.
+imageCroppedWarning = Esta imagen ha sido recortada a {pixels}px.
 # Section for error strings
 # "Out of order" is an humorous way to indicate that the service is not working
 # properly.