How to open and save .txt text files directly in the browser (Opera/Chrome)?

Question

Opera

may have suitable addons
Conditions;
● opening a local file and editing
● saving the CURRENT file (overwriting! instead of creating a new one every time)
● Document bookmarks
● Support for UTF-8
Would be great
● Choice of background colors and font
● Choice of font size and font
optional....
● to in an open document, the menu items "follow link", "search in" worked
● To make links automatically clickable

Answer 1

https://chrome.google.com/webstore/detail/aint/djf...
https://chrome.google.com/webstore/detail/text/mmf...
https://chrome.google.com/ webstore/detail/caret/fl...

Answer 2

One question - what the heck?
The browser is not a text editor, use the tools as intended.