Make web faster - a safe htaccess way

<IfModule mod_deflate.c>
# Insert filters / compress text, html, javascript, css, xml:
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE text/vtt 
AddOutputFilterByType DEFLATE text/x-component
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/js
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/x-javascript
AddOutputFilterByType DEFLATE application/x-httpd-php
AddOutputFilterByType DEFLATE application/x-httpd-fastphp
AddOutputFilterByType DEFLATE application/atom+xml 
AddOutputFilterByType DEFLATE application/json
AddOutputFilterByType DEFLATE application/ld+json 
AddOutputFilterByType DEFLATE application/vnd.ms-fontobject 
AddOutputFilterByType DEFLATE application/x-font-ttf 
AddOutputFilterByType DEFLATE application/x-web-app-manifest+json 
AddOutputFilterByType DEFLATE font/opentype 
AddOutputFilterByType DEFLATE image/svg+xml
AddOutputFilterByType DEFLATE image/x-icon # Exception: Images
SetEnvIfNoCase REQUEST_URI .(?:gif|jpg|jpeg|png)$ no-gzip dont-vary# Drop problematic browsers
BrowserMatch ^Mozilla/4 gzip-only-text/html
BrowserMatch ^Mozilla/4.0[678] no-gzip
BrowserMatch bMSI[E] !no-gzip !gzip-only-text/html# Make sure proxies don't deliver the wrong content
Header append Vary User-Agent env=!dont-vary
</IfModule>
## EXPIRES CACHING ##
<IfModule mod_expires.c>
ExpiresActive On
ExpiresDefault 'access plus 1 week'
ExpiresByType image/jpg 'access plus 1 year'
ExpiresByType image/jpeg 'access plus 1 year'
ExpiresByType image/gif 'access plus 1 year'
ExpiresByType image/png 'access plus 1 year'
ExpiresByType image/svg+xml 'access plus 1 month' 
ExpiresByType text/css 'access plus 1 month'
ExpiresByType text/html 'access plus 1 minute'
ExpiresByType text/plain 'access plus 1 month'
ExpiresByType text/x-component 'access plus 1 month' 
ExpiresByType text/javascript 'access plus 1 month'
ExpiresByType text/x-javascript 'access plus 1 month'
ExpiresByType application/pdf 'access plus 1 month'
ExpiresByType application/javascript 'access plus 1 months'
ExpiresByType application/x-javascript 'access plus 1 months'
ExpiresByType application/x-shockwave-flash 'access plus 1 month'
ExpiresByType image/x-icon 'access plus 1 year'
ExpiresByType application/json 'access plus 0 seconds'
ExpiresByType application/ld+json 'access plus 0 seconds'
ExpiresByType application/xml 'access plus 0 seconds'
ExpiresByType text/xml 'access plus 0 seconds' 
ExpiresByType application/x-web-app-manifest+json 'access plus 0 seconds' 
ExpiresByType text/cache-manifest 'access plus 0 seconds' 
ExpiresByType audio/ogg 'access plus 1 month' 
ExpiresByType video/mp4 'access plus 1 month' 
ExpiresByType video/ogg 'access plus 1 month' 
ExpiresByType video/webm 'access plus 1 month' 
ExpiresByType application/atom+xml 'access plus 1 hour' 
ExpiresByType application/rss+xml 'access plus 1 hour' 
ExpiresByType application/font-woff 'access plus 1 month' 
ExpiresByType application/vnd.ms-fontobject 'access plus 1 month' 
ExpiresByType application/x-font-ttf 'access plus 1 month' 
ExpiresByType font/opentype 'access plus 1 month' 
</IfModule>
## EXPIRES CACHING ##
#Alternative caching using Apache's 'mod_headers', if it's installed.
#Caching of common files - ENABLED
<IfModule mod_headers.c>
<FilesMatch '.(ico|pdf|flv|swf|js|css|gif|png|jpg|jpeg|txt|html|htm)$'>
Header set Cache-Control 'max-age=2592000, public'
</FilesMatch>
</IfModule>
<IfModule mod_headers.c>
  <FilesMatch '.(js|css|xml|gz)$'>
    Header append Vary Accept-Encoding
  </FilesMatch>
</IfModule>
<IfModule mod_gzip.c>
  mod_gzip_on Yes
  mod_gzip_dechunk Yes
  mod_gzip_item_include file .(html?|txt|css|js|php|pl)$
  mod_gzip_item_include handler ^cgi-script$
  mod_gzip_item_include mime ^text/.*
  mod_gzip_item_include mime ^application/x-javascript.*
  mod_gzip_item_exclude mime ^image/.*
  mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*
</IfModule># Set Keep Alive Header
# This *just* sets the header - maybe your hoster is not allowing this feature
# Please check if it is working with tools like http://www.webpagetest.org
<IfModule mod_headers.c>
    Header set Connection keep-alive
</IfModule># If your server don't support ETags deactivate with 'None' (and remove header)
<IfModule mod_expires.c> 
  <IfModule mod_headers.c> 
    Header unset ETag 
  </IfModule> 
  FileETag None 
</IfModule>