Friday, March 22, 2019

The "Add to Ninja" pop-up is blocked in Firefox's latest update

The latest Firefox update (version 66) has come with some "surprise" again.

If you click on the "Add to Ninja" add-on button you will get the "Firefox prevented this site from opening a pop-up window" message even if you already have the Bookmark Ninja website in the exception list of the pop-up blocker. This worked fine in version 65 but not in version 66.

I have contacted the Firefox support forum, I will post if I have any updates on this.

There are 2 workarounds to fix the issue:

Turn off the pop-up blocker completely in Firefox (under Options/Privacy & Security/Permissions)


Use the "Add to Ninja" bookmarklet instead of the Firefox add-on (you can install it from this page with a simple drag and drop)

Please contact me at if you have any questions.

Saturday, February 23, 2019

Fixing the "Ninja extensions can't be installed in Firefox" issue

Some users complained about that they couldn't install the Bookmark Ninja extensions in Firefox.

It seems that the latest Firefox update (v65) broke something. Please follow the below steps to fix the problem:
  • Uninstall Firefox (Add or Remove Programs in Windows 10)
  • Reinstall Firefox from
  • Now you will be able to add the Ninja extensions

Please contact me at if you have any questions.