Pro:
• FOSS
• Useful declared functionality.

Cons:
• The extension settings are reset periodically (the default settings do not suit me).
• The account is periodically logged out (used to synchronize settings between extension instances on different computers or to restore them after reinstalling the browser).

2025-08: At some point, Mozilla Firefox stopped launching in normal mode, but only in Troubleshoot Mode. While in Troubleshoot Mode, I disabled all extensions, then started enabling them one by one, restarting the browser afterwards. When I got to the Notefox extension, in which I had quite a lot of notes by that time (a hundred or more), enabling it almost immediately leads to an irreversible hang of the browser. I am forced to kill the browser process, launch it again, enable the extension - and again get an unresponsive browser window.
I had to stop using the extension.

I really would have loved this as it seems so well put together, clean, and thought out except for on flaw. Yes, it does create notes for a page, however those notes do not show up on the page at all. In fact there is nothing to let make you aware that you ever did create a note on a page. Instead you have to click on the extension and then you will see your note. So, unless you remember you've made a notation to a page somewhere, or refer to notes made in the past within the extension itself and then revisit a page from there, you have no idea if you've done so. Its a bit unrealistic to expect people to remember they've created notes on websites/pages should they go back to them if there is no visible sign that you've done ever done so.

Aside from that major flaw, the only other aspect I would add would be to allow for the add-on to be accessed through the contextual menu rather than having to click on a pinned icon in the toolbar.