Looking at PR 18492 it doesn't seem that the `$percent` variable, for the `pdfjs-editor-new-alt-text-ai-model-downloading-progress` l10n-string, was ever used.
Looking at PR 18492 it doesn't seem that the `$percent` variable, for the `pdfjs-editor-new-alt-text-ai-model-downloading-progress` l10n-string, was ever used.