Well that was odd... Rated 1 out of 5 stars
I'm in agreement with The Prodigal Son; and found the slew of positive reviews for this add-on to be odd.
Needed to disable it then re-enable for the button to show up (never a good sign, imho).
Also, can't move the button on the toolbar. That is something that I just can't cope with.
Looks neat otherwise, but I can't get past fundamental flaws.
1. 【Drag and drop the extension icon to other places.】 The new firefox addon SDK https://jetpack.mozillalabs.com/ doesn't support drag and drop feature yet. The addon team is working on it and once this feature is available, we will integrate it in all our addons. Thanks for your patience.
2. Some users reported this issue: Needed to disable it then re-enable for the button to show up (never a good sign, imho). ====》We can't reproduce the issue. Please shoot an email to developer 【 at】diigo.com with more details.