How does it "look like it is connected"?

For my 10.10 installation, I had to manually load the correct
"specialty" driver. Then set up the wireless, also by hand. I have
seen that 10.10 does not start-up and connect to wireless automatically
every time - does not work sometimes on return from hibernation. You
might try starting it manually - there should be a hard-to-see icon on
your task panel - it will "spin" if the driver is searching. You can
also click on the icon and go to the appropriate selection (mine is
"connect to hidden wireless network"). You can also create a new
wireless network.

I mean the name of the wireless connection appear, and it also said the name of
the wireless connection and connected, but nothing happen.
How did you manually load the speciality driver? it gave 2 options, played with
both of then, no luck

Try: System > Administration > Additional Drivers

Broadcom wireless chipsets have always been a problem but are now
included in the standard updates so connecting via Ethernet and
getting those updates should sort it. You could also temporarily plug
in a USB Wi-Fi adapter and get on-line with that if the Ethernet is
also Broadcom !

It sounds like you need to install the Broadcom proprietary driver. Try
running Hardware drivers (now called Additional Drivers).

I tried both Broadcom B43 wireless driver and Broadcom STA wireless driver, both
are proprietary drives, and none work. It says the name of my wireless
connection and connection stablished, but when I open the browser it doesn't
work

From no apparent reason to me it works now
Thank you to everybody for ALL your help
It is fun to learn more about Ubuntu-Kubuntu in a Microsoft-free computer