Wt

Progressive enhancement fails to reliably enable Ajax mode on some browsers. I've seen it occur with Windows 7/Firefox 21 and Debian Wheezy/Iceweasel 10.0.12. The problem appears to be timing-related and seems more likely to occur with the Firebug add-on debugger open.

In particular, the issue has been observed with Firefox 21, Firebug, and the wt-homepage example, running git version 3.3.0-10-g45b859b. The console log varies with version, but Windows 7, Firefox 21 had: "TypeError: db is null ... if (db.addEventListener) home line 308". At this time, the issue can also be observed on the project's home page.

It's possible that this issue is related to the one reported in #1902.

I will update this report with a link to a patch that seems to have helped, at least in some limited testing.