Update 1-30-2024: The new Reddit redesign necessitated a new version of Bulk Upvoter for Reddit that could penetrate all the unnecessary shadow DOM elements. While I was modifying things, I updated the script to be compatible with old.reddit.com and new.reddit.com.
NOTE: Due to browser limitations, sharing settings automatically between different versions of Reddit is impractical. However, the script allows you to export and import settings for easy migration.
Update 1-27-2024: In cases where a post is displayed on top of another page, only the comments in that post will be upvoted, and the background page will be left alone.