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Delayed page loads

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Firefox version 63.0.1 on Windows PC. This week, Firefox is slow to load all web pages. After pressing enter in the address bar or clicking a link, approximately 3-5 seconds will elapse before any page information is displayed. During this time, the bouncing ball is in motion where the favicon is usually displayed on the tab next to the page title. Then the page will visually load very quickly, while the bouncing ball continues for another 3-5 seconds before indicating the page load is complete.

This happens consistently on all webpages. The same behavior is observed in Firefox safe mode. Chrome loads pages without delay on this computer. This is a relatively new behavior which I've noticed within the past week. I'm on a 100Mb/s connection with very low latency and a fast DNS response (< 5 ms).

Firefox version 63.0.1 on Windows PC. This week, Firefox is slow to load all web pages. After pressing enter in the address bar or clicking a link, approximately 3-5 seconds will elapse before any page information is displayed. During this time, the bouncing ball is in motion where the favicon is usually displayed on the tab next to the page title. Then the page will visually load very quickly, while the bouncing ball continues for another 3-5 seconds before indicating the page load is complete. This happens consistently on all webpages. The same behavior is observed in Firefox safe mode. Chrome loads pages without delay on this computer. This is a relatively new behavior which I've noticed within the past week. I'm on a 100Mb/s connection with very low latency and a fast DNS response (< 5 ms).

Chosen solution

cor-el, thank you for the thoughtful recommendations on this matter though they didn't directly fix the problem. I did take your idea that some file in my Firefox profile may be the culprit. So, I took out the small sledge hammer and did a Firefox refresh (big sledge would be a clean install). Unfortunately that meant spending a bit of time getting Firefox set back up the way I like it, but it has solved the problem and restored the usual fast response times to which I'm accustomed.

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Additional System Details

Application

  • Firefox 63.0.1
  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:63.0) Gecko/20100101 Firefox/63.0
  • Support URL: https://support.mozilla.org/1/firefox/63.0.1/WINNT/en-US/

Extensions

  • Adblock Plus 3.4 ({d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}) (Inactive)
  • MD5 Reborned Hasher 0.9.0.1-signed.1-signed (md5rehasher@phoneixs.es) (Inactive)
  • Troubleshooter 1.1a.1-signed.1-signed (troubleshooter@mozilla.org) (Inactive)
  • Web Developer 2.0.1 ({c45c406e-ab73-11d8-be73-000a95be3b12}) (Inactive)

Javascript

  • incrementalGCEnabled: True

Graphics

  • adapterDescription: Intel(R) HD Graphics 4000
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  • adapterDrivers2:
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  • crashGuards: []
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  • directWriteVersion: 10.0.17134.1
  • driverDate: 4-4-2016
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Modified Preferences

Misc

  • User JS: No
  • Accessibility: No
FredMcD
  • Top 10 Contributor
3765 solutions 52009 answers
[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode] {web link} by holding down the '''<Shift> ''(Mac=Options)''''' key, and then starting Firefox. A small dialog should appear. Click '''Start In Safe Mode''' (not Refresh). Is the problem still there? https://support.mozilla.org/kb/Firefox+is+already+running+but+is+not+responding https://support.mozilla.org/en-US/kb/firefox-slow-how-make-it-faster https://support.mozilla.org/en-US/kb/firefox-uses-too-many-cpu-resources-how-fix https://support.mozilla.org/en-US/kb/firefox-uses-too-much-memory-ram https://support.mozilla.org/en-US/kb/firefox-hangs-or-not-responding
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Question owner

FredMcD said

Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox. A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

I preemptively answered this.

None of the pages you referenced share the symptoms described above.

Please do not be so dismissive of the information in the original post.

''FredMcD [[#answer-1171701|said]]'' <blockquote> [https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode] {web link} by holding down the '''<Shift> ''(Mac=Options)''''' key, and then starting Firefox. A small dialog should appear. Click '''Start In Safe Mode''' (not Refresh). Is the problem still there? </blockquote> I preemptively answered this. None of the pages you referenced share the symptoms described above. Please do not be so dismissive of the information in the original post.
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WestEnd
  • Top 10 Contributor
57 solutions 3294 answers

@Steve none is being dismissive there has to be diagnosis steps to figure where problems are starting from. If you really want help making disparaging remarks towards those helping won't get much help.

@Steve none is being dismissive there has to be diagnosis steps to figure where problems are starting from. If you really want help making disparaging remarks towards those helping won't get much help.
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cor-el
  • Top 10 Contributor
  • Moderator
16646 solutions 150453 answers

You can check for problems with the places.sqlite database (bookmarks and history) in the Firefox profile folder.

  • use "Verify Integrity" button on the "Help -> Troubleshooting Information" (about:support) page
    in case errors are reported close and restart Firefox and retry

See also:

You can check for problems with the sessionstore file(s) in the Firefox profile folder that stores session data.

  • delete sessionstore.jsonlz4 and sessionstore.js

You can also check for issues with the files in the sessionstore-backups folder.

When sessionstore.jsonlz4 is deleted you lose pinned tabs and open tabs and you will have to recreate them, so if necessary make a note or bookmark them.

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.

You can check for problems with the <b>places.sqlite</b> database (bookmarks and history) in the Firefox profile folder. *use "Verify Integrity" button on the "Help -> Troubleshooting Information" (about:support) page<br>in case errors are reported close and restart Firefox and retry See also: *http://kb.mozillazine.org/Locked_or_damaged_places.sqlite *https://support.mozilla.org/en-US/kb/Bookmarks+not+saved#w_fix-the-bookmarks-file You can check for problems with the sessionstore file(s) in the Firefox profile folder that stores session data. *delete sessionstore.jsonlz4 and sessionstore.js You can also check for issues with the files in the sessionstore-backups folder. When sessionstore.jsonlz4 is deleted you lose pinned tabs and open tabs and you will have to recreate them, so if necessary make a note or bookmark them. You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the <b>about:profiles</b> page. *Help -> Troubleshooting Information -> Profile Directory:<br>Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder *http://kb.mozillazine.org/Profile_folder_-_Firefox
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Chosen Solution

cor-el, thank you for the thoughtful recommendations on this matter though they didn't directly fix the problem. I did take your idea that some file in my Firefox profile may be the culprit. So, I took out the small sledge hammer and did a Firefox refresh (big sledge would be a clean install). Unfortunately that meant spending a bit of time getting Firefox set back up the way I like it, but it has solved the problem and restored the usual fast response times to which I'm accustomed.

cor-el, thank you for the thoughtful recommendations on this matter though they didn't directly fix the problem. I did take your idea that some file in my Firefox profile may be the culprit. So, I took out the small sledge hammer and did a Firefox refresh (big sledge would be a clean install). Unfortunately that meant spending a bit of time getting Firefox set back up the way I like it, but it has solved the problem and restored the usual fast response times to which I'm accustomed.
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