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Outlook via Firefox shows titles, no content. Outlook is OK via safe mode, Chrome, MS Edge and MAIL

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Outlook via Firefox shows titles, no content. Sometime I can read the content of the first email I select, but, no content appears in subsequent emails, just the titles. Outlook is OK via the Firefox safe mode, via Chrome, via MS Edge and via MAIL.

I have cleared cookies and cache.  I have also tried About:config>extensions.webcompat.enable_shims changed to FALSE.  

A sidebar with web addresses disappeared too. I think I have been done in by an update. What setting am I missing? I am using Firefox 114 with Windows 10

Outlook via Firefox shows titles, no content. Sometime I can read the content of the first email I select, but, no content appears in subsequent emails, just the titles. Outlook is OK via the Firefox safe mode, via Chrome, via MS Edge and via MAIL. I have cleared cookies and cache. I have also tried About:config>extensions.webcompat.enable_shims changed to FALSE. A sidebar with web addresses disappeared too. I think I have been done in by an update. What setting am I missing? I am using Firefox 114 with Windows 10

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If you use extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) that can block content (Adblock Plus, NoScript, DuckDuckGo PE, Disconnect, Ghostery, Privacy Badger, uBlock Origin) always make sure such extensions do not block content.

Firefox shows a purple shield instead of a gray shield at the left end of the location/address bar in case Enhanced Tracking Protection is blocking content.

  • click the shield icon for more detail and possibly disable the protection

You can check the Web Console for relevant-looking messages about blocked content.


You can try these steps in case of issues with webpages:

You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.

  • hold down the Shift key and left-click the Reload button
  • press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
  • press "Command + Shift + R" (Mac)

Clear the Cache and remove the Cookies for websites that cause problems via the "3-bar" Firefox menu button (Settings).

"Remove the Cookies" for websites that cause problems:

  • Settings -> Privacy & Security
    Cookies and Site Data: "Manage Data"

"Clear the Cache":

  • Settings -> Privacy & Security
    Cookies and Site Data -> Clear Data -> [X] Cached Web Content -> Clear

Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or if userChrome.css/userContent.css is causing the problem.

  • switch to the Default System theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click the "Refresh Firefox" button on the Troubleshoot Mode start window