Firefox will not open a file requiring javascript, then hangs; forced close is the only solution

Firefox 3.6.6 opens OK. Browsing OK, until I try to open a file that requires Java. The file will not open & Firefox immediately hangs. The only way out is a forced closure. Often getting a "This is embarrassing message" at the Firefox start-up. 2 choices are given - start new session or start up with previous tabs.
== This happened ==
Every time Firefox opened
== After updating Firefox to 3.5 & 3.6.6

requires javascript.

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Firefox will not open at all. I tried to remove it from the programs to try to reinstall it but it wont let me remove it. So I tried to download again anyways and ff still wont open. My email is alicia@*****

Firefox will not open at all. I tried to remove it from the programs to try to reinstall it but it wont let me remove it. So I tried to download again anyways and ff still wont open. My email is alicia@****

Did you check your security software (firewall)?
A possible cause is security software (firewall) that blocks or restricts Firefox without informing you about that, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox 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.
See [[Server not found]] and [[Firewalls]] and http://kb.mozillazine.org/Firewalls
If necessary then also see:
* http://kb.mozillazine.org/Browser_will_not_start_up
* http://kb.mozillazine.org/Error_loading_websites

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See if either of these support article help you.
https://support.mozilla.com/en-US/kb/Using+the+Adobe+Reader+plugin+with+Firefox
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Try resetting your Homepage.
http://support.mozilla.com/en-US/kb/How+to+set+the+home+page

What can I do to rectify the situation in which Firefox will not open pdf files in the browser, even though I have already used all the help suggestions to no avail?

I have tried everything Mozilla has suggested. Still when I click on a pdf, I get the message that the browser cannot open a pdf. I have gone through the help protocol, and it does not work.
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A possible cause is the presence of a PDF plugin from an older Adobe Reader plugin in the plugins folder in the Firefox program folder.
See [[Troubleshooting plugins]]
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http://kb2.adobe.com/cps/836/cpsid_83688.html - I can’t view a PDF document in my web browser<br />

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See if either of these support article help you.
https://support.mozilla.com/en-US/kb/Using+the+Adobe+Reader+plugin+with+Firefox
https://support.mozilla.com/en-US/kb/Opening+PDF+files+within+Firefox

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I cannot open pdf file links. How can I fix this. nothing happens when I click on a pdf link, a new window/tab will open up and it does not attept to load a page, I just get a blank window.

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https://support.mozilla.com/en-US/questions/763393

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Reader 10.1.0 will not open PDF files

Hi
Reader 10.1.0 will not open PDF files in windows 7 64 bit using IE9
However it open using firefox?
Is it my settings ?
Is this version not compatible with IE9 ???
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I am able to open PDF in IE9 on win 7 64 bit machine using Reader 10.1
Additionally,as per system requirements mentioned in Reader 10.1 download page (http://www.adobe.com/support/downloads/detail.jsp?ftpID=5138),Reader 10.1 is compatible with IE9.
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Hi lwhealon
try from Start > Run > and type to check 1 of :
firefox -safe-mode
"C:\Program Files\Mozilla Firefox\firefox.exe" -safe-mode '''or'''
"C:\Program Files (x86)\Mozilla Firefox\firefox.exe" -safe-mode
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For Mac check the Safari preferences.
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Tabs to set the other options.
Hold down the command key to open any link in a new tab.
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== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; (R1 1.6); Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; SLCC1; OfficeLiveConnector.1.5; OfficeLivePatch.1.3)

Maybe you restored to a version of Firefox that crashes or still have a virus problem.
(irrc some Firefox versions specifically had problems after Windows restores)
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See also
*[[backing up your information]]
* [[is my firefox problem a result of malware]]
* a typical post about malware checks:<br/>[/questions/914980#answer-302372]

Firefox will not open a file requiring javascript, then hangs; forced close is the only solution

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