I have been given a laptop with pre-installed software and I am connecting to the internet on it via company wifi.
When I am accessing a secure website using https, I want to ensure that the LAN admin is not snooping my data. If I understand right,snooping could be possible if certficates in my browser are compromised (for example, by adding a certifying authority certificate, using which a man-in-the-middle will be able to issue self-signed certificates).
My question is, is there a quick way to check if the certificates recognized by my browser (Firefox, Chrome) are the default ones, and haven't been tampered with?
The next level would be checking that the keys in my Ubuntu's apt system are also not tampered. But that would make for another question I guess.