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Tab automatically opens and then closes within 1 second. REASON & FIX?

  • 4 replies
  • 1 has this problem
  • 28 views
  • Last reply by Paul

MicahStone
MicahStone
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With FF 140.0 on both WIn10 and WIn11, new tabs opened automatically then closed after less than a second. Initially I thought this was due to malware, but on inspecting the History, I found the source of this annoying behavior:

// SidebarUtil.tab.js

// This is just a placeholder file to be loaded in a temporary tab to check if a sidebar is open and how wide it is.

Is there a way to STOP this sidebar checking with its tab opening/closing without disabling Java entirely ? Is this annoying behavior really necessary in FF ?

With FF 140.0 on both WIn10 and WIn11, new tabs opened automatically then closed after less than a second. Initially I thought this was due to malware, but on inspecting the History, I found the source of this annoying behavior: // SidebarUtil.tab.js // This is just a placeholder file to be loaded in a temporary tab to check if a sidebar is open and how wide it is. Is there a way to STOP this sidebar checking with its tab opening/closing without disabling Java entirely ? Is this annoying behavior really necessary in FF ?

All Replies (4)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
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Hi, which "Firefox 140.0" are you using?

  • Regular release: this is now on 142.0 as of today
  • Extended Support Release: this is now on 140.2.0esr as of today

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scarredpelt
scarredpelt
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jscher2000 - Support Volunteer said
Hi, which "Firefox 140.0" are you using?
  • Regular release: this is now on 142.0 as of today
  • Extended Support Release: this is now on 140.2.0esr as of today

Jefferson, I have the same issue. I am using 142.0.1 (64-bit) I have no sidebars open, I also do not have the sidebar selection activated.

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MicahStone
MicahStone Question owner
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"Firefox 140.0" are you using?" It's happening on FF140, 142,and now 143 on both Windows 10 and Windows 11 computers.

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Paul
Paul
  • Top 10 Contributor
  • Moderator
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Just in case there is something more at the back of this, please follow the steps below to provide us crash IDs to help us learn more.

The crash report is several pages of data. We need the report numbers to see the whole report.

  1. Enter about:crashes in the Firefox address bar and press Enter. A list of Submitted (and Unsubmitted, if any) Crash Reports will appear, similar to the one shown below.
  2. Copy the 5 most recent Submitted Report IDs that start with bp- and then go back to your forum question and paste those IDs into the "Post a Reply" box.

Note: If a recent Report ID does not start with bp- click on it to submit the report.

(Please don't take a screenshot of your crashes, just copy and paste the IDs. The below image is just an example of what your Firefox screen should look like.)

Fx115aboutcrashes

Thank you for your help!

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