It seems the browsers are taking too long to load a page. As you mentioned you use "Google Chrome" with other browsers, I am suggesting here some fixes that work for "Google Chrome" web browser. If this works, corresponding changes to other browsers will be made.
If Google Chrome seems to take a long time to load a website or search, it may be configured to access pages through a web proxy. Check whether the "Resolving proxy" message appears in the lower-left corner of the browser window.
Follow these steps to change your proxy setting (for Windows):
1. Press the keys Alt + E, S to open Settings for Google Chrome.
2. Click Show advanced settings.
3. Click Change Proxy Settings.
4. Click LAN Settings.
5. Deselect the Automatically detect settings checkbox.
I would like to help you here. As you mentioned you can open the Gmail but no other pages, this indicates your computer is connecting to the internet. This problem could be related to some settings. I would like to know if you receive any error messages when opening other pages. Also, in your reply please add the type of connection you are using and the web browsers you commonly use.
I had the same issue. In my case only Gmail worked. I had to restart to solve it. It seems to have something to do with the windows firewall. I have to use the recommended settings or the internet crashes.