Opera Mini 5 introduced tabs on J2ME—a near miracle. The 128x160 build used a at the top of the screen, but only if content canvas > 100px. Otherwise, tabs were moved to a vertical list accessible via "Menu > Tabs". Maximum tabs: 4 (enforced to prevent out-of-memory errors on OBML page cache).

When a user searches for "Opera Mini 5 jar," they are looking for a Java application. Unlike today's APKs (Android) or IPAs (iOS), JAR files were universal but required specific configurations to run correctly on different screen sizes.