Max number of URL suggestion broken Rated 3 out of 5 stars
Even I made it 50 it shows 13.This review is for a previous version of the add-on (126.96.36.199-signed.1-signed).
The maximums are now 10 each for both search and history/bookmark suggestions - for a total of 20. I chose these numbers for a few reasons, like search suggestion providers only returning a max of 10 suggestions, and Firefox's UI really only being able to handle displaying 10-20 results in the suggestions dropdown (10 for the 'Rich' style, 20 for 'Simple').
Note: this change has been made in v2.1, which is currently submitted for review.