Rated 4 out of 5 stars

I can't remove these from context menu:
-Duplicate tab
-Recently closed tabs

Reuse blank tabs:
If the current tab is a blank tab and I open a bookmark, homepage, ... by a middle click, those will open in the current blank tab, and not in a new tab (new tab is default behaviour).

(And where is the support forum?)

This review is for a previous version of the add-on (1.0.6.1-signed.1-signed). 

Read the main page to get the entry to the support forum.
You may hide any menuitem with userChrome.css. What's the harm of reusing the current blank tab? Firefox also reuses the current blank tab, but not always. For example, open a new blank tab, type www.google.com in the location bar and press Alt+Enter.

Rated 5 out of 5 stars

This addon is fantastic, but please fix these bugs:

You removed options of these features but you forgot to remove their behaviour.:
-"Tab clicking options"
-"Close tab by double click, Undo close tab by middle click on tab bar"
-"Reuse blank tabs"
-"Load in new tab option"
So I can't disable them. I would like the browser's default behaviour.

I also can't disable these (and also I can't remove from context menu):
-"Undo close tab by middle click on tab bar"
-"Duplicate Tab"

This review is for a previous version of the add-on (1.0.2.1-signed.1-signed). 

Please read the hidden options on the main page for disabling "Close tab by double click" and "Undo close tab by middle click on tab bar".
Please post your other problems in the support forum to get further help. The information you provided is not enough. What default behavior are you losing?