评分1星，满分5星

由 Paqid Yirmeyahu Ben-David 发表于 March 27, 2014 ·

Version installed on older Firefox still works on Firefox upgraded to 28. But won't install on a new computer running Firefox 28. Failure to install rates zero.

That fixed it. Thanks. back to 5 stars.

这个评论是针对附加组件的一个早期版本的（1.0.5.09.1-signed.1-signed.1-signed）。 

作者 iharz (开发者) 日期 March 27, 2014 ·

fixed in http://hcalendar.blogspot.co.il/2013/12/mozilla-extension-hcalendar-version.html