Accurate Popup Positioning: Fixed an issue where the definition popup would miscalculate coordinates and render in the corner of the browser view port. Popups now consistently anchor directly above/below the selected word.

Performance Optimizations: Streamlined background look-ups and reduced DOM injection overhead, resulting in noticeably faster dictionary query response times and smoother popup rendering.

General Polish: Minor bug fixes and stability improvements for text selection handling across various webpage layouts.