Excellent list of extensions, which I will certainly be investigating and hopefully using.

However, whereas I am a huge advocate of Google Chrome, it is worth mentioning that the global usage share statistics mentioned at the beginning of the article are from W3Schools' own log files, not from an eclectic range of websites as you would prefer for a statistic of this nature - especially considering the numbers have been given as the reason for writing the article. People that visit the W3Schools website are not your average man on the street.

Of course, Chrome still has a larger following, it is just not nearly as pronounced as this article would suggest.