The original uBO relies on Manifest V2, the API Chrome no longer supports. It's impossible to run full UBO (not Lite MV3 version) on current versions on Chrome.
reply>It's impossible to run full UBO (not Lite MV3 version) on current versions on Chrome.
replyCurrent version of Chrome seems to be 152.0.7977.39 released August 14, 2026.
August 14, 2026 Chromium 152.0.7977.38 based vivaldis napshot https://vivaldi.com/blog/desktop/address-field-calculator-an... has this in patch notes:
"[Extensions] Re-enable and extend Manifest V2 extension support for the time being (VB-130324)"