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Firefox only initializes in half width size of the computer screen.

  • 5 replies
  • 1 has this problem
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  • Last reply by cor-el

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This may be coincidence but I just added several Firefox tweaks listed at None of them seem like they could have any affect on this but ...

Now when I initialize FF it appears full height but only half the width of my screen.

So I pull it over to full width, close it, re-initialize, and it's still half width.

Rebooted, no change.


All Replies (5)

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If you are not sure what caused this, remove what you did before. You can check with Privacytools support.

BTW, were the changes made to Firefox, or your system?

Refreshing Firefox {web link} is a LAST RESORT ! !

Refreshing Firefox -- easily fix most problems

If you're having problems with Firefox, refreshing it can help. The refresh feature fixes many issues by restoring Firefox to its factory default state while saving your essential information like bookmarks and open tabs. Everything else, like user settings and add-ons, are removed.

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"BTW, were the changes made to Firefox, or your system?"

FF only.

But I think only these 3:

"privacy.firstparty.isolate = true

   A result of the Tor Uplift effort, this preference isolates all browser identifier sources (e.g. cookies) to the first party domain, with the goal of preventing tracking across different domains. (Don't do this if you are using the Firefox Addon "Cookie AutoDelete".)

privacy.resistFingerprinting = true

   A result of the Tor Uplift effort, this preference makes Firefox more resistant to browser fingerprinting.

network.IDN_show_punycode = true

   Not rendering IDNs as their punycode equivalent leaves you open to phishing attacks that can be very difficult to notice. Source

It's hard to understand how any of those could affect the browser size. But something has done so.

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"You can check with Privacytools support."

There is no real support per se.

I've asked questions in their Reddit and sometimes a poster will respond. No one who has identified themself as Privacytools has responded.

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Have you tried restoring those settings to their default values?

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If you enable resist fingerprinting the your user agent changes to Firefox 52 (esr). Also the window dimensions reported to websites change to some generic values.

You can check this preference on the about:config page and make sure it has the default value.

  • privacy.resistFingerprinting = false

You can open the about:config page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue.

You can rename/remove xulstore.json and if present delete localstore.rdf in the Firefox profile folder with Firefox closed.

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.