A list of sites for homeowners with useful directions on how to use a fire extinguisher:

• Choosing and Using Fire Extinguishers
  https://www.usfa.fema.gov/prevention/outreach/extinguishers.html
• OSHA: Portable Fire Extinguishers
  https://www.osha.gov/SLTC/etools/evacuation/portable_use.html
  
• wikiHow: How to use a fire extinguisher
  https://www.wikihow.life/Use-a-Fire-Extinguisher