Wallabag [0] may do what you require, with regard to having a browser extension to reduce friction when saving something. There's a bit of friction in getting the browser extension set up, but once you do so, it's there as a status bar button - click to save. Simple! On mobile, it becomes a "share destination" for iOS or Android.
normally you could also just create a bookmarklet and create a window for management within the page (all pages, where you can do bookmarks sensibly should support that)
[0] https://github.com/wallabag