As stated on official Ultimate Chrome Flag Google Chrome Extension page, “This extension displays country or region name, Geo, Google PageRank, Alexa Rank and WOT info for the websites you’re visiting.” Yes, it worked at the first time. But, when I try to visit many websites and try to gather new updates about those websites it seems Ultimate Chrome Flag extension is not working.
You want to check PageRank or Alexa ranking on any blog? You can use the Ultimate Chrome Flag Google Chrome extension. According to my version, this extension provide the best. Its only weaknesses are it can’t detect inner page PageRank and the Alexa ranking update is not too up-to-date.