I cannot help with your broader question, however I was hit with a similar issue when the firefox scrapbook add-on I was using to save pages was killed by the quantum upgrade. I have been using zotero, a research citation manager, that might meet some of your requirements. It downloads with single click and has the ability to sort and search based on creation date. I found out that Zotero used the same engine as the scrapbook plug-in to create webpage snapshots. I had been happy with the quality of those snapshots.
It used to be that Zotero kind of lived in the browser as a plugin. However, now it is a standalone application (database) with plugins (it calls connectors) located in the browser. As you surf, the Zotero plugin attempts to categorize the type of site you are on. The icon it displays will change based on how it categorizes the webpage. When you press the icon, it automatically creates a snapshot of the page AND does its best to pull the information that would be needed if you were citing the page in a paper. A small pop up in the right corner of the screen shows when it has started and when it has finished. If it is a pdf, it will download the pdf and try and pull all the relevant information from the pdf. The zotero indexs all of the web pages and pdfs so they are searchable. You can also navigate the the folder where all the saved web pages (or snapshots as they are called) are located. These are in Mhtml format.
While the file name will not have the date created in it as you would like, you have the file created date. In fact Zotero has an interesting "timeline" tool where you can organize your saved links (citations) as a timeline using various variables, including i believe the date created.
https://www.zotero.o..._tutorials/timelinesAt first, I was a little apprehensive about using Zotero because I do not want another application in my workflow. However, it has been open source for quite some time, it has a big following, and I have enjoyed the interface. It also has an export feature I could see being useful should I need it.
Hope this helps