I access MN on my laptop. I use Firefodx and open tabs for threads I'm following.
In the last week or so two very unhelpful things have started happening:
A tab for a thread I've been on suddenly vanishes and surfaces at the extreme right of the tabs bar, way beyond non MN stuff - the weather forecast, news, twitter stuff. Maddening, and half the time leaves me re-opening the same thread.
And (particularly if I'm moving tabs) I keep getting offered some blue box thing that I don't want.
I've been blaming Firefox - now I'm wondering is it Mumsnet's fault? If so, please stop it, it's extremely un-(this)-user friendly.