Create a support article with useful information about the upgrade

[bsclifton]

• Article can live at https://support.brave.com/hc/en-us/articles/360018538092 (this should be live, although only accessible to admins)
• The deprecated Muon browser can link to the article (see Show a notice about how browser-laptop is deprecated #1544)
• This should help folks that hit edge cases (described in Document the Muon upgrade path #1863) who need manual support

Some important goals for the support article

• Describe why this upgrade is needed
• Explain the possible impact to the user
  • needing to import, if that part fails
  • Brave Rewards impact (items that were pinned may need to be resolved manually to direct tips)
  • How default browser setting is affected (and how to set Brave Core as new default browser)

The article can then also contain information on:

• where the Muon profile lives (and letting them know it's not touched during the upgrade)
• how to launch the old browser (in case they need to save Brave Payments reports, etc)
• how to grab extension data (ex: MetaMask)
• how to find/install extensions they may have had enabled in Muon Brave

[diracdeltas]

can someone let me see the article? login is [email protected] (google auth)

[bsclifton]

@diracdeltas both you and @jumde should have access now 😄 Since this article has been created and has a decent amount of content, I'll close the issue. We'll of course want to review before launch 😄