annotations disappeared on reloading the page on wikipedia.

I found that highlighting and annotations on a page mysteriously moved to another page where, of course, it made no sense.

When the add on is enabled web pages do not show. I just see a blank window.

I liked the overall simplicity of this addon. However, I had to uninstall it because when it was enabled some webpages were coming up blank. If this issue could be fixed, I certainly would give it a try again.

This is exactly what I want, but the UI is not that good though. I suggest that it's better to put the button in right-click list instead of a pop-up. For color and other about UI, its style is inconsistent with Firefox's default style, which is the problem. Anyway, everything is up to you.
And, I hope you could implement a switch, which can enable/disable the pop-up, I don't want to see that button every time I select something.

Makes this page blank :-/
https://www.jetbrains.com/help/youtrack/standalone/Back-Up-the-Database.html

Poorly designed extension. The HTML elements (annotator) it injects inside pages conflicts with some sites and adds an empty space on half of the page. I disabled it.

Ciao Francesco!

It's a great addon in principle but I found a few more bugs so I hope you could fix them.
1. using the addon destroys my google calendar UI. In the week view I cannot scroll down past 17:00 and when I want to create/ edit an event I don't see all the details below the date and time (type of calender, reminder etc)
2. the youtube page is completely messed up, with different fonts types and size
3. I thing the adress/ search bar of the browser also starts looking different.

I hope you can solve this because the idea of this addon is great!

It has a bug adding a 20px padding on the top edge of every page. Please fix it.

Out of the box it messes up web pages, mail becomes invisible, some pages bottom half is cropped to only show white space.

This is a nice simple annotation tool. Hey Franc! are you on chrome also?