Mozilla and Microsoft don't always see eye to eye when it comes to browser technology, but they agree broadly on one thing: thumbs down for.
"I certainly share that longing for a Web in which the vast majority of Web users enjoy the performance and capabilities we see in Chrome, Safari, Firefox, and Opera. Unfortunately, I don't think that Chrome Frame gets us closer to that Web," Shaver said.
Specifically, Shaver said Chrome Frame can disable IE features and muddle users' understanding of Web security matters. And users of the reviled IE 6 browser, he added, often won't be able to run Chrome Frame anyway because their computer is locked down to prohibit changes or lacks sufficient power in the first place.
"As a side effect, the user's understanding of the Web's security model and the behavior of their browser is seriously hindered by delegating the choice of software to the developers of individual sites they visit. It is a problem that we have seen repeatedly with other stack plug-ins like Flash, Silverlight and Java, and not one that I think we need to see replayed again under the banner of HTML5," he said.
Shaver's advice is to rely on that ages-old technique: an upgrade suggestion on the Web site.
"It would be better for the Web if developers who want to use the Chrome Frame snippet simply told users that their site worked better in Chrome and instructed them on how to install it," Shaver said. "The user would be educated about the benefits of an alternate browser, would understand better the choice they were making, and the kudos for Chrome's performance would accrue to Google rather than to Microsoft."