the screen shot sim with bookwalker and brave browser
so it worked fine until it didn’t
Wanted to share this info in case anyone else has this issue. Normally it wouldn’t have been an issue but this a new laptop and haven’t setup the system wide backups, only the key docs are being backed up. This is on my to do list in another week or so when the last of stuff is installed and everything is setup how I want.
In the meantime.....
But in any case, the script worked really well and then the whole browser shut down all windows while it was running. Logs weren’t much help. After much searching, renaming files etc… no matter what I tried reopen the browser restore the windows and it would almost immediately crash closed. Guess this has happened back in 2022 with some windows update but right now they are all paused so that wasn’t it.
The only solution seemed to be the nuclear one (already tried reinstalling) and everything else. Was able to restore the bookmarks but basically had just installed yomitan and dictionaries all had to be blitzed.
If in windows, renaming the C:\Users*(your user folder)*\AppData\Local\BraveSoftware\Brave-Browser\User Data and letting Brave create a new one fixed the problem but of course back to square one with all the browser settings, plug ins, tabs ugh!!! Hadn’t even been 24 hours since installing yomitan and dictionaries 
So before doing anymore screen caps, I reset everything and then got all the tabs where I wanted them and essentially force closed Brave to make sure it “remembered” everything and reopened and it worked.
Then kill the browser completely and create a copy of the “User Data” folder, leaving in the same location is fine. Didn’t think I was going to need it but after 10 or so volumes, it shutdown again. Same issue wouldn’t stay open, instant crash. The script itself seems innocuous, but it’s doing something unintentional (not breaking/trapping out of the crash?) and/or not getting along with something else. Since the computer is newer and not a lot of stuff setup the browser something to the profile unintentionally and it’s dead. Happened a total of 5x. The other 4x was happy to have the backup.
So before running this script in Brave (or maybe another browser) backup your User data folder for a fast recovery:

@ChristopherFritz if you wanted to tinker around with this or try to troubleshoot I haven’t deleted anything, ping me on discord.
Otherwise just sharing so hopefully will help out someone else if they have this issue. Thankfully finished all the image grabs (didn’t realize I had purchased duplicate digital copies of so much manga (51 vol - not counting the shosetu)
and so you know a chunk of these series/vols are you're fault
And yes I have the paperback of these as well - I’ll be sending you a bill c/o Takagi san 
EDIT: Hey had anyone used setup and used Mokuro2PDF?
Seems like need to install more stuff and uhhhhh 