i really hope you guys add a convenient way to load bricks as public, yours or saved owner soon.
Yep, my next focus will be a general rework of the load bricks page since I'd like there to be a lot more control over how you load things. Ownership and brick clearing are two of them.
Also, for the in-browser manager, could you please add a datablock counter so that we can tell how many we are using without having to start up the server and see what is broken or not?
Probably not, no. There's no easy way to know how many datablocks an add-on has unless you decompress it, interpret all the files (harder than you think) and then de-duplicate all the datablocks against eachother. It's just not feasible, sorry.
I can't test it for certain at the moment, but the security warning is no longer present on Firefox.
Sounds like a good sign. I spotted a lingering issue with the loading of autosaves/uploaded saves in Firefox which we'll sort out separately.