Firefox very slow when first loading pages from new domains.

Question

I've noticed that when starting the browser or opening up a new site it takes a considerably longer amount of time to load all the JS and assets compared to Chrome. Typically an extra 10 to 20 seconds, which is seriously annoying and nontrivial. After I've loaded the first page from the site Firefox is usually pretty fast on loading new pages from the same domain.
Firefox also sometimes fails to render CSS, resulting in a white page in Times New Roman and misplaced images.
I've tried setting up a new installation of Firefox and it hasn't solved the problem. Also tried Firefox portable with no addons and I got the problem straight out of the gate. It seems to be a problem with the code as Chrome and my internet connection work just fine. I've tried using Google as my primary DNS (8.8.8.8) which hasn't changed much.

Answer 1

You can try to disable hardware acceleration in Firefox.
*Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"
You need close and restart Firefox after toggling this setting.
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
*https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration
Create a new profile as a test to check if your current profile is causing the problem.
See "Creating a profile":
*https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues
If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox