While testing the webapp I am working on, I have noticed that firefox seems to be ignoring the cache header for user images.
All such images are loaded through a PHP script, here is a sample response:
Cache-Control: private, max-age=0
Connection: Keep-Alive
Content-Disposition: inline; filename="Immagine.jpg"
Content-Encoding: gzip
Content-Length: 33103
Content-Type: image/jpeg
Date: Thu, 16 Mar 2017 15:24:39 GMT
Etag: allegato-4f04349dba5b5f636a439af71ed75109b701a01d6ac5dfc287dee9729ce4e2098b02e39a2d673789213f5fdf20ceb21a0fc26f17e93e602e38238c3681b9bd00
Expires: Fri, 16 Jun 2017 16:24:40 +0200
Keep-Alive: timeout=5, max=100
Last-Modified: Tue, 16 Jul 2013 10:18:04 +0200
Server: Apache
Vary: Accept-Encoding
and here are the relevant parts of the request sent by firefox:
Host: mywebapp.local
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:51.0) Gecko/20100101 Firefox/51.0
Accept: */*
Accept-Language: it-IT,it;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache
I think the issue might be due to FF sending those Pragma and Cache-Control headers, however I checked multiple times and I have caching enabled.
The "same" request on Chrome, which caches correctly, looks like this:
Accept:image/webp,image/*,*/*;q=0.8
Accept-Encoding:gzip, deflate, sdch
Accept-Language:it-IT,it;q=0.8,en-US;q=0.6,en;q=0.4
Connection:keep-alive
DNT:1
Host:mywebapp.local
If-Modified-Since:Tue, 16 Jul 2013 10:18:10 +0200
If-None-Match:allegato-4f04349dba5b5f636a439af71ed75109b701a01d6ac5dfc287dee9729ce4e2098b02e39a2d673789213f5fdf20ceb21a0fc26f17e93e602e38238c3681b9bd00
User-Agent:Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36
How can I determine if this issue is related to my own browser, or rather to the webapp itself?
Disable HTTP Cache when toolbox is openoption (which is checked by default) in the "Toolbox Options" (the panel on ctrl+shift+i ). I guess you did this as well, right? – nikos.svnk