Firefox Community Forum

Apologies in advance if I use terminology incorrectly.

I've had this strange but intermittent issue for a while (through multiple Firefox versions) where pages will take a long time to load. I haven't timed loads exactly but I can confidently say it's a minimum of 10 seconds. The problem with diagnosing this issue is it's very intermittent; I can go hours or on a rare occassion days without it happening (I think, maybe I've just not registered some of the times it's happened). I have yet to try disabling all addons because of this.

Random quirks about the issue:

• It only happens on navigation to a new domain (or to a domain from a new tab). Once a domain has loaded, I don't have an issue on said domain for a while.
• It isn't tab specific. I can open a new tab in the same window and they will both take the same amount of time to load, often finishing at the exact same time.
• While waiting for a page to load, I can open a Private Browsing window, paste the URL, and the page will load immediately without issue in the Private Browsing window. This does not affect the page being loaded in the main window.
• I believe it has occurred immediately after a system restart, thus I don't believe it is related to long-running sessions.

The addons I have that don't also run in Private Browsing are:

• Augmented Steam
• BetterTTV
• Enhancer for Youtube (I can't find the addon store link?)
• Firefox Multi-Account Containers
• PocketTube
• Return YouTube Dislike
• SponsorBlock
• The Camelizer
• Youtube High Definition

About a week ago, my Firefox browser started being extremely slow to load. It loaded the shortcuts but the page full of news things to click on never loaded. Instead, the rectangles where they would go were just illuminated from left to right with a gray sweep light to dark over and over. I left it going and hours later it was still doing it. I clicked on some of the shortcuts and some came up and others did not, at least during the time I was willing to wait. I went to Google Chrome and it was slower than usual but eventually I was able to get to my email, ebay, etc. I spent hours on the phone with Xfinity/Comcast and they ran tests and said everything was ok. I checked and found that I have the latest version of Firefox. Is it possible that an update caused this? If not, what is going on?

Any idea why it keeps being unable to open sites at some point, about 2-3 days after being opened? Might load eventually, but only after about 10 mins... private mode still loads quickly, though...? I tried playing with DNS, no proxies...