Thank you for the detailed feedback and the positive review.

I have implemented the following fixes in version 1.3.0:

1. Match case option - Added a case-sensitive checkbox for each replacement to handle names like "On" that double as common words.

2. Smart case preservation - The extension now maintains capitalization patterns (all caps stay all caps, etc.).

3. Collapsible replacement fields - Each replacement can be collapsed by clicking its header, which shows a preview of the replacement pair.

4. Reorderable replacements - Replacements can now be dragged and dropped to reorder them.

5. Fixed horizontal scrollbar - Adjusted the popup width and added proper responsive constraints.

6. Fixed parenthesis issue - Improved the regex pattern to correctly handle text inside parentheses and other special characters.

Regarding Reader View support: After testing, Reader View resets the page content which removes the replacements. This is a limitation I cannot work around.

All other requested features have been successfully implemented. Thank you again for the thorough feedback.