I'm using tor browser version "tor-browser-linux64-6.0.7" in ubuntu14.4. But its speed is awful. In addition while it's downloading a file, it uses a great amount of my Internet traffic compared to the size of the file. Similarly, while opening a website, it consumes much Internet traffic, compared to the traffic needed for that website to be opened without Tor. Since Tor is censored in my country, in answer to question
Does your Internet Service Provider (ISP) block or otherwise censor connections to the Tor Network?
I checked Yes option, and it uses obfs4 as the bridge to connect to Tor. Any other settings of my Tor are configured to their defaults.
Is there any way to speed up my Tor? Do I have to make some special configuration to my Tor to overcome this problem? Thank you for your help.