Does Time Machine back up EVERYTHING?

i'm take macbook pro apple store repair. i'm going up, time machine cover everything? things preferences in adobe products , firefox?

 

tm doesn't every little thing (parts of os), things.

 

Forums Macs Mac Basics and Help

• iPhone
• Mac OS & System Software
• iPad
• Apple Watch
• Notebooks
• iTunes
• Apple ID
• iCloud
• Desktop Computers
• Apple Music
• Professional Applications
• iPod
• iWork
• Apple TV
• iLife
• Wireless