First of all, many many thanks for your great extension, i've tried a lot of them, and eventually found Web Scraper.
I'm still using the 0.2 version, cause i can customize it's CSS style inside the dev tab, i've removed the urls so i can see just IDs of the maps and buttons - compact and effective. I've also remade the download link to look like a huge button (so it looked like 'start scraping' one, but bigger)
I've been watching Web Scraper being updated during time, also loved Jens Willmer's regex trim function, altho it won't scrape at all (couldnt figure out why haha). (UPDATE: i was so wrong, sitemap JSON is different due to added extra functions of regex trimming and so on -- it works)
Yesterday i've tried 0.3.7 version - it's absolutely awesome, and works much faster, one of my websites that i scrape delays the page load, and this version skips the delay (which is great).
When i tried to find out how to customize the CSS/Styles to make it look like i did before -- it's all inside the .js script now, if i try to add any other classes it just won't work.
It would be great if it will be possible to customize the UI, hope for your answer.
I'd love to help the project if it's possible. It's the best tool i've ever seen.