The report for indicates this is a legacy version of the browser, originally released in November 2012 . While it was a major update at the time for its data-saving capabilities, it is now considered obsolete and potentially insecure for modern web browsing. Product Overview Version: 7.5.1 Release Date: November 12, 2012 Original Requirements: Android 1.5 or higher
Since this version is no longer on the Google Play Store, it is hosted on various community archives: Official Archive Opera's public server contains various historical builds. Third-Party Mirrors : Sites like maintain verified versions of the 7.5.1 and 7.5.5 APKs.
The APK file is remarkably light, typically weighing in at less than 1MB (~903 KB to 925 KB depending on the variant). Technical Specifications & Requirements
With a file size under 1MB, it is designed for low-storage devices and slow network conditions like 2G or 3G. Usage Considerations & Security Opera Mini 7.5.1 APK Download by Opera - APKMirror
By integrating directly with Facebook and Twitter , users could view their latest social updates without opening separate apps, saving both time and device memory.