Auto-fills bookmarks with a clickable link "Title – Author – 0 words, Chapter 0/0". Adds a quick-save button that pops up in the corner when you scroll up, used to capture mid-read jumps. Compatible with Entire Work. Shows +new chapters/words on the bookmarks page.
Allows creating bookmarks in the middle of works (including Entire Work mode), seeing which got updated on your Bookmark page, knowing that you left a mark inside a work, quickly jumping back, and not loosing the name of deleted works.
Autofills 3 Different kinds of Titles+links based on you scroll position on the page:
Chapter 2/14 MiddleChapter 2/14 Start direct chapter linkChapter 2/14 End special #NEXT link, will automatically click the "Next chapter" button when the page opens.On your "/user/.../bookmarks" page:

Note: outdated picture, the orange count is fixed +7 now.
Triggers:

To update a previous bookmark:
It replaces it own link or prepends it automatically (preserves other bookmark text).
Simply press "Bookmark" then "Update".
Top bookmark display: Inside works, displays the bookmark above the title in purple. Lets you know if you left a bookmark and quickly jump to it.
Accidental corner click: If you accidentally hit the button and got sent down, the link above the box will send you back up and close the box.
Porting links to this script: Unfortunately, you need to manually open each work to the right chapter, and press "Edit Bookmark" then "Update". (The link is autofilled, though you may want to clean up your custom comment that will be pushed to the end). You can manually edit the link title wordocunt & chapter N/M if you remember them, to better reflect you reading state.
Experimental: Since bookmarks can have tags, any tag starting with 'fav' (case insensitive) give the work a pink inline, while 'watch' gives it a green outline.
Note: Set PRIVATE_BOOKMARK=false if you do not want this script to mark your bookmarks "private" by default. (private bookmarks do not raise a work's bookmark count, undermining my other Qscore addon. Set false if you want your bookmarks to count as a vote.)
Unused: Passively scrapes bookmarks from the "/user/bookmarks" page displaying the total at the top, for future use in search.