I've been using Tree Style Tabs as an add-on with FF for around 5 years now. Starting a few weeks ago I noticed that FF is just flaky as ever whenever I have Mangolassi open in a tab. ML itself often gives scripting timeout errors, etc, but it causes all of the open tabs to hang constantly (FF title bar will say Not responding frequently). In an effort to see what my problem was I looked at my add-ons and the only slightly unusual things I have are Lastpass and Tree Style Tabs. So I removed Tree Style Tabs first. Since then things have been working fine. Anyone else using this add-on? If not, anyone else willing to install it and see how things behave for them?

Agreed, done and fixed in vanilla/persona (and by extension, lavender).

I've noticed over the past week on Mangolassi.it and now here when making another report that when I am surfing around the site, or clicking a button, frequently my browser will hang for a moment (up to several seconds). Then occasionally the browser will white out and say Not Responding.

I went to reference some of my chat history only to learn that I'm limited to only 3 months worth of history (on a technical forum 2-3 years would be nice) and even worse, I don't actually see the full three months, instead it only goes back exactly 2 months. Any chance you can re institute the history back for 3 months? I'd really like to retrieve a conversation there.