ADR extension files are a type of Bookmarks created by Opera for its Opera Software browser.
Opera is a cross-platform web browser developed by Opera, which bears the same name.
Opera is based on Chromium, however, it is distinctive from other Chromium-based browsers due to its user interface and other features.
ADR files are for configuring and adding features to the browser, specifically for marking visited pages.
ADR files are not designed to be opened manually.
If you downloaded a ADR file on Android device you can open it by following steps below:
To open ADR File on iOS device follow steps below:
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