(I cant edit my first post...) I installed keepassx on linux, but I see to way to start a server that this addon could connect at localhost:19455 to let it be more integrated. Any tips?

this works on linux (ubuntu)? I dropped KeePassHttp.plgx at ~/.config/opera/Extensions/blablabla/0.4.8_0/keepass but did not work...

it doesnt seem to work on this very addonś site only, got me puzzled, but works on all other sites, thx!

this uses an external server to store our passwords (therefore sync with other machines)? (I dont want this but that is not clear on the description)
or this only stores them offline on a single machine with a master password? (I am looking for this)

oh ok, to use it we must pin the addon so the icon shows up and we can access itś menu and generate a huge password, thx!