FireFox doesn't cache XXXXXXXXXX.cache.html

[Михаил Ольховский]

FireFox always reload XXXXXXXXXX.cache.html file. Chrome and IE work fine

Request Headers

Host	localhost:8181
User-Agent	Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.21) Gecko/20110830 Firefox/3.6.21
Accept	text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language	en-us,ru;q=0.7,en;q=0.3
Accept-Encoding	gzip,deflate
Accept-Charset	ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive	115
Connection	keep-alive

Response Headers

Server	Apache-Coyote/1.1
Expires	Fri, 13 May 2050 23:30:00 GMT
Cache-Control	max-age=315360000
Accept-Ranges	bytes
Etag	W/"2059548-1314855704000"
Last-Modified	Thu, 01 Sep 2011 05:41:44 GMT
Content-Type	text/html
Content-Length	2059548
Date	Fri, 02 Sep 2011 13:17:54 GMT

XXXXXXXXXXX.cache.html files are too big and it is too expensive to reload them every time.

Can anybody to help me with this problem?

[Thomas Broyer]

Well, the issue here is that Firefox doesn't even send a conditional request. How did you capture this request?

How, and 2Mb is really big! How about using code splitting? http://code.google.com/webtoolkit/doc/latest/DevGuideCodeSplitting.html

BTW, it might also be wise to disable Etags: see http://www.websiteoptimization.com/speed/tweak/etags-revisited/ , http://developer.yahoo.com/performance/rules.html#etags and http://code.google.com/speed/page-speed/docs/caching.html

From that last page: “It is important to specify one of Expires or Cache-Control max-age, and one of Last-Modified or ETag, for all cacheable resources. It is redundant to specify both Expires and Cache-Control: max-age, or to specify both Last-Modified and ETag. ”

And finally, your "max age" is too far in the future: “Do not set it to more than one year in the future, as that violates the RFC guidelines.” (same source)