In periods, FF freezes again and again

In periods, FF freezes again and again

Start Firefox in <u>[[Safe Mode|Safe Mode]]</u> to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
*Do NOT click the Reset button on the Safe mode start window or otherwise make changes.
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
*https://support.mozilla.org/kb/Server+not+found
*https://support.mozilla.org/kb/Firewalls

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    x044ae000..0x044afbe8]
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    at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1972
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    at javax.swing.JComponent.paintChildren(JComponent.java:842)
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    at javax.swing.JComponent.paintWithOffscreenBuffer(JComponent.java:4963)
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    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:132)
    at sun.java2d.Disposer.run(Disposer.java:107)
    at java.lang.Thread.run(Thread.java:595)
    "Low Memory Detector" daemon prio=6 tid=0x0102abe0 nid=0x1268 runnable [0x000000
    00..0x00000000]
    "CompilerThread0" daemon prio=6 tid=0x010297b0 nid=0x10a8 waiting on condition [
    0x00000000..0x0379f84c]
    "Signal Dispatcher" daemon prio=6 tid=0x010265a8 nid=0x1050 waiting on condition
    [0x00000000..0x00000000]
    "Finalizer" daemon prio=8 tid=0x01019358 nid=0x48c in Object.wait() [0x0359f000.
    .0x0359fce8]
    at java.lang.Object.wait(Native Method)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:116)
    - locked <0x13470208> (a java.lang.ref.ReferenceQueue$Lock)
    at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:132)
    at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
    "Reference Handler" daemon prio=6 tid=0x010188a0 nid=0xb80 in Object.wait() [0x0
    349f000..0x0349fc68]
    at java.lang.Object.wait(Native Method)
    at java.lang.Object.wait(Object.java:474)
    at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
    - locked <0x13470288> (a java.lang.ref.Reference$Lock)
    "main" prio=6 tid=0x00378f08 nid=0x15b8 waiting on condition [0x00000000..0x0012
    fb70]
    "VM Thread" prio=6 tid=0x01015e78 nid=0x1474 runnable
    "VM Periodic Task Thread" prio=6 tid=0x010455c0 nid=0x5cc waiting on condition

    Yup, that's a deadlock. While obviously steps to reproduce deadlocks always help, I think I see enough information there to look into the issue.
    - John
    SQL Developer Team

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