I used to have a bookmarklet that would take selected text on a web page and generate a quoted block and link in markup suitable for use in TiddlyWiki.

Arc Browser doesn't support bookmarklets for some strange reason, so I (finally) converted my bookmarklet to a Chrome extension using this tool.

I put a zipped copy here:

copy-quoted-text-for-tiddlywiki.zip

Unzip it, click the "Load unpacked" button on Arc/Chrome's Extensions page and select the folder. No guarantees that it'll work for you, but you're welcome to it.