Please upgrade here. These earlier versions are no longer being updated and have security issues.
HackerOne users: Testing against this community violates our program's Terms of Service and will result in your bounty being denied.
BBInsertBar 0.1.5 issues with FF
Well, I installed the extension in my blog and if I used Firefox and clicked "HTML\BBCODE" (In my case, I've disabled BBcode ATM but the same thing happens with or without BBCode) and click buttons like Bold, Italic, Underline and Strike, it just adds the letter next to the button while it works perfectly in Internet Explorer's case.