Chrome: "This extension is no longer supported" and it got disabled — a Mac workaround

Update Chrome to the latest version, making sure it is v138.0.7204.101 or newer
Set this flag to Enabled

chrome://flags/#temporary-unexpire-flags-m137

Restart the browser so the change takes effect
Set all of the following to Disabled

chrome://flags/#extension-manifest-v2-deprecation-warning

chrome://flags/#extension-manifest-v2-deprecation-disabled

chrome://flags/#extension-manifest-v2-deprecation-unsupported

Set the following to Enabled. Note: this is the parameter for solution two; it is worth enabling while you are here, but everything still works without it

chrome://flags/#allow-legacy-mv2-extensions

sudo mkdir -p "/Library/Managed Preferences" && sudo tee "/Library/Managed Preferences/com.google.Chrome.plist" >/dev/null <<EOF
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" 
  "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <key>ExtensionManifestV2Availability</key>
  <integer>2</integer>
</dict>
</plist>
EOF

From LinuxDo