I only have LastPass on add-on. I have not added any other addons. We also deleted cookies and caches. I refreshed it. I restarted the PC. But the slowness of the move did not change.

I did the same. I have no add-ons. I refreshed it, per Mozilla suggestion. I deleted the app and reinstalled on my very fast Mac. No change. Will Mozilla issue an update? If not, I will have to abandon. Insanely, ridiculously slow.

I think you all have the same problem as i do...the "fastest browser" sits and DOES NOTHING when you click on buttons...then after 30 seconds, it DOES SOMETHING. Currently on 57.0.2 "pretend Quantum". I think the problem lies with the LACK OF ACTION. Remember the clockwise / counter clockwise indicators that is now some crappy blurb that moves left and right? The crappy blurb only does something when IT FEELS LIKE IT. This is a random thing, but I do surveys for IPOS/I-say. At least once every survey I find that I click on a button...and click...and click..

I believe Mozilla is HIDING the fact that they AREN'T any faster than they used to be. They apparently picked up Chrome's BAD HABIT of posting more cpu processes than they need. I have (3) tabs open. I have (6) processes holding 1224740 of memory hostage. How do you feel about that?