🇧🇷 Para o tutorial em português clique [aqui]

START FIREFOX AND DIGIT IN THE SEARCH BOX:
         about:config*Then press enter
Paste the command and search, then change the value:
    network.http.pipelining              |True                            
    network.http.pipelining.maxrequests  |32                  
    network.http.proxy.pipelining        |True                      
    network.dns.disableIPv6              |True                            
    plugin.expose_full_path              |True                            
    nglayout.initialpaint.delay          |0                           
    content.notify.backoffcount          |5                           
    ui.submenuDelay                      |0                                       
    browser.cache.memory.capacity        |32768                     
    layout.spellcheckDefault             |2                              
    browser.download.animateNotifications|False              
    security.dialog_enable_delay         |0                           
    network.prefetch-next                |False                              
    browser.newtabpage.activity-stream.feeds.telemetry |False 
    browser.newtabpage.activity-stream.telemetry       |False       
    browser.ping-centre.telemetry        |False                      
    toolkit.telemetry.archive.enabled    |False                  
    toolkit.telemetry.bhrPing.enabled    |False                  
    toolkit.telemetry.enabled            |False                          
    toolkit.telemetry.firstShutdownPing.enabled        |False        
    toolkit.telemetry.hybridContent.enabled            |False            
    toolkit.telemetry.newProfilePing.enabled           |False           
    toolkit.telemetry.reportingpolicy.firstRun         |False         
    toolkit.telemetry.shutdownPingSender.enabled       |False      
    toolkit.telemetry.unified            |False                         
    toolkit.telemetry.updatePing.enabled |False               
    reader.parse-on-load.enabled         |False                       
    reader.parse-on-load.force-enabled   |False                 
    browser.pocket.enabled               |False                             
    loop.enabled                         |False