I would suggest using the Evernote facility to snapshot pages to your Evernote research notes.
This is as simple as right clicking on a page and selecting an option:
Once you have selected such a snapshot you can close the page secure in the knowledge that it is in your library and accessible via the web interface, the PC App or the Mobile App. Such notes are saved rendered but complete with the original URL, the date, etc. and can be annotated, tagged, deleted, etc. later.
In a research environment it is awesome as it allows you to organize, cite and even (on some plans) collaborate. As well as web content it can handle PDF files, Photos with text (Android). There is a WebClipper plugin for Chrome and other browsers, Safari, Firefox, Edge, IE7+ & Opera, (IE/Edge is installed with the desktop client). There are also plug-ins available for Outlook & Safari.
There are a number of plans available, (including free), for the service with different prices, quotas and tools. It is worth noting that eligible students, (i.e. those with access to a recognized educational domain email address), may be able to get 50% discount on the premium plan via an offer page. On the Free plan you can currently have 2 devices registered.