Fix code style in extensions/firefox/content/PdfjsContentUtils.jsm
Fix code style in extensions/firefox/content/PdfJs-stub.jsm
Fix code style in extensions/firefox/content/PdfJsTelemetry.jsm
Fix code style in extensions/firefox/content/PdfJsTelemetry-addon.jsm
Fix code style in extensions/firefox/content/PdfStreamConverter.jsm
Update |node make lint| to also cover the Firefox specific *.jsm files