Bloat alert! Rated 3 out of 5 stars

Although this is a good extension, and probably even better than the original ScrapBook, I can't help but wonder about the size of the latest versions. Take a look:
Original (Gomita's) ScrapBook: 237 KB
ScrapBook+ v. 1.4.6.16: 477 KB
ScrapBook+ v. 1.5.7.17: 550 KB
ScrapBook+ v. 1.6.7.18: 618 KB
ScrapBook+ v. 1.6.8.19: 620 KB
ScrapBook+ v. 1.6.9.20: 788 KB !!

What's up with that?

This review is for a previous version of the add-on (1.6.9.20).