Opera Norway AS · Browser & OS extension stores
Opera Add-ons is the official catalog for extensions in the Opera desktop browser, which is Chromium-based and consumes standard WebExtensions/Manifest packages. Because of that compatibility, developers can port Chrome extensions with minimal changes, and Opera also lets users install Chrome Web Store extensions directly via a bridge — but native listing gives dedicated discovery within Opera's ecosystem.
Submission is free through the Opera developer dashboard, but each extension goes through human moderation against Opera's acceptance criteria: it must deliver genuine functionality, ship a valid manifest, and must not contain obfuscated or minified first-party code. Reviews are thorough but historically slow, with developers reporting multi-week to multi-month queues, so time-to-publish is a real consideration. There is no store-level commerce layer, so monetization, if any, happens inside the extension against the developer's own backend. Opera Add-ons is a low-cost, WebExtensions-standard distribution surface whose main friction is moderation latency rather than fees.