Firefox always slow and lagging.

Hi, am using Windows 10 Pro X64 official and Mozilla Firefox.

For some reason my Firefox browser is always lagging.
Chrome works fine though.

When I open a new tab, the browser starts lagging, when I open multiple tabs it's lagging a lot.
Click a link -> Start lagging.

Why is this happening? Had the same thing on Windows 7 but the lags seems more in Windows 10.
How do I go about fixing this issue?

Hello:

Most Firefox problems originate in the user's profile, regardless of the version of the Windows OS.

For starters, I suggest trying the standard troubleshooting here:
Standard Diagnostic - Firefox

Or you might try the suggestions here:
Fix slowness, crashing, error messages and other problems

Please post back and let us know how it goes.

Thanks,