Veja neste artigo configurações importantes de se adicionar no arquivo
.htaccess para servidores web/PHP:Redirecionamento HTTP para HTTPs
RewriteEngine On RewriteCond %{SERVER_PORT} 80 RewriteRule ^(.*)$ <https://www.dominio.com.br/$1> [R,L]
Remover extensões dos arquivos na URL
<IfModule mod_rewrite.c> Options +FollowSymLinks -MultiViews RewriteEngine On RewriteBase / RewriteCond %{THE_REQUEST} ^[A-Z]{3,}\\s([^.]+)\\.html [NC] RewriteRule ^ %1 [R,L] RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME}.html -f RewriteRule ^(.*?)/?$ $1.html [L] </IfModule>
Exibir página não encontrada - 404
ErrorDocument 404 /404.html
Ativar compactação GZIP
AddOutputFilterByType DEFLATE text/plain AddOutputFilterByType DEFLATE text/xml AddOutputFilterByType DEFLATE application/xhtml+xml AddOutputFilterByType DEFLATE text/css AddOutputFilterByType DEFLATE application/xml AddOutputFilterByType DEFLATE image/svg+xml AddOutputFilterByType DEFLATE application/rss+xml AddOutputFilterByType DEFLATE application/atom_xml AddOutputFilterByType DEFLATE application/x-javascript AddOutputFilterByType DEFLATE application/javascript AddOutputFilterByType DEFLATE application/x-httpd-php AddOutputFilterByType DEFLATE application/x-httpd-fastphp AddOutputFilterByType DEFLATE application/x-httpd-eruby AddOutputFilterByType DEFLATE text/html SetOutputFilter DEFLATE BrowserMatch ^Mozilla/4 gzip-only-text/html BrowserMatch ^Mozilla/4.0[678] no-gzip BrowserMatch ^HMSI[E] !no-gzip !gzip-only-text/html SetEnvIfNoCase Request_URI .(?:gif|jpe?g|png)$ no-gzip dont-vary
Habilitar Keep Alive
<ifModule mod_headers.c> Header set Connection keep-alive </ifModule>