In case you want to build (compile) and install Tor from source code, you can follow these steps:
Install pre-requisites, in this example I used a Debian based GNU Linux distribution:
sudo apt install -y git build-essential automake libevent-dev libssl-dev zlib1g-dev
Clone Tor from git.torproject.org:
git clone https://git.torproject.org/tor....
Yes, correct, it should be some nicely round number.
Sadly, there are still some bugs in the implementation. The ones I've observed myself are:
high-DPI screens can be at fault (issue 40081)
zooming (issue 32253)
I could not find any bugs indicating that fitting a window to the screen could cause this, as suggested by Alexey. If that is what you observe, ...
In case you want to protect your communication from your ISP, the best practice would be to use Tor over VPN.
A VPN establishes an encrypted tunnel between your device and the VPN server, concealing your true IP address and your activities from your ISP and any hackers or malicious individuals who might be monitoring the network.
Using Tor with a VPN gives ...