There are many extensions available, also for free, which will add new functions and features to your browser.
Firefox has a good pop-up blocker, users can choose default folder where downloads will be saved, can save passwords for sites (although i do not recommend to save passwords in browser), add bookmarks with drag&drop, set desired web address for homepage and default search engine for search bar.
- easy to use
- many plugins available for free
If you like to use and try various extensions to add new features and personalize your browser, Firefox is highly recommended.