"manifest_version": 3
Supported values for this key are:
3: Use the Manifest V3 format and associated feature set.
The current version is Manifest V3. The Chrome Web Store no longer accepts manifest V2 extensions
(see Manifest V2 support timeline for more details). There will be other manifest
versions in the future (V4 and beyond), but these aren't scheduled yet.
  
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
  
Last updated 2013-05-12 UTC.
      [[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2013-05-12 UTC."],[],[]]