Exploiting the browser caching

I like this plugin: https://wordpress.org/plugins/autoptimize/

It should help with your pagespeed quite a bit :)

This is a very nice plugin but it does not define a timeout cache images, if by chance you have another idea?

You may have to go with something like W3 Total Cache to get that kind of flexibility.

I already use WP Fastest Cache which is the best cache plugin of those I tested.

I have I modified the file ".htaccess" by adding (from http://www.deepintheweb.com/optimiser-un-fichier-htaccess/) :

# BEGIN Cache-Control Headers
<ifmodule mod_headers.c>
 <filesmatch "\\.(ico|jpe?g|png|gif|swf|gz|ttf)$">
 Header set Cache-Control "max-age=2592000, public"
 </filesmatch>
 <filesmatch "\\.(css)$">
 Header set Cache-Control "max-age=2592000, public"
 </filesmatch>
 <filesmatch "\\.(js)$">
 Header set Cache-Control "max-age=2592000, private"
 </filesmatch>
<filesmatch "\\.(html|htm)$">
Header set Cache-Control "max-age=7200, public"
</filesmatch>
# Disable caching for scripts and other dynamic files
<filesmatch "\.(pl|php|cgi|spl|scgi|fcgi)$">
Header unset Cache-Control
</filesmatch>
</ifmodule>
# END Cache-Control Headers

RewriteEngine on
#Check to see if browser can accept gzip files. If so and we have it – serve it!
ReWriteCond %{HTTP:accept-encoding} gzip
RewriteCond %{HTTP_USER_AGENT} !Safari
#make sure there’s no trailing .gz on the url
ReWriteCond %{REQUEST_FILENAME} !^.+.gz$
#check to see if a .gz version of the file exists.
RewriteCond %{REQUEST_FILENAME}.gz -f
#All conditions met so add .gz to URL filename (invisibly)
RewriteRule ^(.+) $1.gz [QSA,L]
<ifmodule mod_gzip.c>
mod_gzip_on Yes
mod_gzip_dechunk Yes
mod_gzip_keep_workfiles No
mod_gzip_can_negotiate Yes
mod_gzip_add_header_count Yes
mod_gzip_send_vary Yes
mod_gzip_command_version ‘/mod_gzip_status’
mod_gzip_min_http 1000
mod_gzip_minimum_file_size 300
mod_gzip_maximum_file_size 512000
mod_gzip_maximum_inmem_size 60000
mod_gzip_handle_methods GET POST
mod_gzip_temp_dir /tmp
mod_gzip_item_include file .html$
mod_gzip_item_include file .php$
mod_gzip_item_include file .pl$
mod_gzip_item_include file .rb$
mod_gzip_item_include file .py$
mod_gzip_item_include file .cgi$
mod_gzip_item_include file .css$
mod_gzip_item_include file .js$
mod_gzip_item_include mime ^application/javascript$
mod_gzip_item_include mime ^application/x-javascript$
mod_gzip_item_include mime ^text/.*
mod_gzip_item_include mime ^httpd/unix-directory$
mod_gzip_item_include handler ^cgi-script$
mod_gzip_item_include handler ^server-status$
mod_gzip_item_include handler ^server-info$
mod_gzip_item_include handler ^application/x-httpd-php
mod_gzip_item_exclude mime ^image/.*
</ifmodule>

# BEGIN Expire headers
<ifmodule mod_expires.c>
 ExpiresActive On
 ExpiresDefault "access plus 7200 seconds"
 ExpiresByType image/jpg "access plus 2592000 seconds"
 ExpiresByType image/jpeg "access plus 2592000 seconds"
 ExpiresByType image/png "access plus 2592000 seconds"
 ExpiresByType image/gif "access plus 2592000 seconds"
 AddType image/x-icon .ico
 ExpiresByType image/ico "access plus 2592000 seconds"
 ExpiresByType image/icon "access plus 2592000 seconds"
 ExpiresByType image/x-icon "access plus 2592000 seconds"
 ExpiresByType text/css "access plus 2592000 seconds"
 ExpiresByType text/javascript "access plus 2592000 seconds"
 ExpiresByType text/html "access plus 7200 seconds"
 ExpiresByType application/xhtml+xml "access plus 7200 seconds"
 ExpiresByType application/javascript A259200
 ExpiresByType application/x-javascript "access plus 2592000 seconds"
 ExpiresByType application/x-shockwave-flash "access plus 2592000 seconds"
</ifmodule>
# END Expire headers

But Google PageSpeed always tells me that it is no time limit specified for my images :

Exploitez la mise en cache du navigateur pour les ressources suivantes pouvant être mises en cache :
http://www.maggeek.com/…332e231a03706ea2c500/1432802522index.css (délai d'expiration non spécifié)
http://www.maggeek.com/…3a06813c432386a0bf82b/1432802522index.js (délai d'expiration non spécifié)
http://www.maggeek.com/…89ffed6c16366921d5c6/1432802521index.css (délai d'expiration non spécifié)
http://www.maggeek.com/…fabdde1bf3771e1e12fe/1432802522index.css (délai d'expiration non spécifié)
http://www.maggeek.com/…float-to-top-button/css/img/arrow001.png (délai d'expiration non spécifié)
http://www.maggeek.com/…uploads/2014/12/Intel-e1417382636860.png (délai d'expiration non spécifié)
http://www.maggeek.com/…oads/2014/12/lichtreflex-421101_1920.jpg (délai d'expiration non spécifié)
http://www.maggeek.com/wp-content/uploads/2015/04/AMD.png (délai d'expiration non spécifié)
http://www.maggeek.com/…tent/uploads/2015/04/Geneva-E-Sport2.png (délai d'expiration non spécifié)
http://www.maggeek.com/wp-content/uploads/2015/04/Hubble.jpg (délai d'expiration non spécifié)
http://www.maggeek.com/wp-content/uploads/2015/04/Point-6.png (délai d'expiration non spécifié)
http://www.maggeek.com/…content/uploads/2015/05/Barre-grise1.png (délai d'expiration non spécifié)
http://www.maggeek.com/…ntent/uploads/2015/05/PC-BSD-150x150.jpg (délai d'expiration non spécifié)
http://www.maggeek.com/…ads/2015/05/chromixium-logo1-150x150.png (délai d'expiration non spécifié)
http://www.maggeek.com/wp-content/uploads/2015/05/ibmx519.jpg (délai d'expiration non spécifié)
https://translate.googleapis.com/…ranslate_static/css/translateelement.css (60 minutes)
https://translate.googleapis.com/…ate_static/js/element/26/element_main.js (60 minutes)
https://translate.googleapis.com/translate_static/js/element/main_fr.js (60 minutes)

It is very complicated to make these settings correctly...

I agree - definitely not my area of expertise unfortunately.

Perhaps your hosting will be able to help you further? All of my caching etc.. is dealt with by my server.

I have found this documentation:

https://developers.google.com/speed/docs/insights/LeverageBrowserCaching?hl=us

It is the host that should enable caching system. I have it contacted.

Thank you for your support.