Do you have that problem when running in the Firefox SafeMode? http://support.mozilla.com/en-US/kb/Safe+Mode Don't select anything right now, just use "Continue in SafeMode."

If not, see this: http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+theme...

Did a complete uninstall including registry with Revo uninstaller then clean 3.6.3 install Same problem, no change. The problem is only right clicking in a folder, the options disappear when the mouse is moved over to make a selection.

Did you reinstall all the extensions you previously had installed?

Hmmm, for some reason my reply to the first question never got through... anyway, I tried to run Firefox in safe mode, same problem. Disabling all extensions and plugins: same problem.

Same here, the problem exists with no extensions installed after a clean reinstall. Also in safe mode. I deleted all user preferences and cleaned the registry and still have the same problem, within a bookmark folder, right click menu disappears with mouse over. It's really irritating.

I have the same issue... anytime I right-click any item on the main menu bar I get the pop-up menu showing my options but as soon as I try to select one the menu goes away.

I only have Ad-block, No-script, Linkification and the Java ones installed.

Well....? Doesn't anyone have an idea of what's wrong? I'm pretty sure it will require a registry hack to repair. Any smart firefox people out there?

Are you using a persona? Do you have the Menu Bar hidden? View > Toolbars > [[X] Menu Bar

I'm not using a persona and I don't have the menu bar hidden. I do run Window Blinds, but I uninstalled it, tried Firefox again, problem remained.

But instead of asking all these questions, is there perhaps someone who can confirm that (s)he is *NOT* having this problem? That would at least give an indication about whether it's something in a specific client configuration or a general bug in Firefox...

No, it's not a Bug in Firefox, the vast majority of Firefox users don't have that problem. It is a problem unique to your installation.

We are asking questions to get you to do a little troubleshooting to help you find find the source of your problem, but with all the "Anonymous" postings in this thread it makes it hard to know who is answering a "helpers" question and who is posting an off-topic comment about their own problem.

Ok, I didn't mean to come across in an offensive way (my apologies if I did, which was unintentional), I just didn't know that apparently this isn't a general Firefox problem, but probably has to do with my configuration :)

(I'm glad that people are already thinking in terms of "which possibilities are there that could cause this behaviour?" but some contextual feedback is also nice every now and then ;) )

Anyway, I don't know if it helps, but here is my current configuration, in which the problem still exists:

 Application Basics

       Name
       Firefox

       Version
       3.6.6

       Profile Directory

         Open Containing Folder

       Installed Plugins

         about:plugins

       Build Configuration

         about:buildconfig

 Extensions

       Name

       Version

       Enabled

       ID

       Fission
       1.0.9
       true
       {1280606b-2510-4fe0-97ef-9b5a22eafe41}

       Image Toolbar
       0.6.8
       true
        

       Java Quick Starter
       1.0
       true
       jqs@sun.com

       LastTab
       2.2
       true
       {68E5DD30-A659-4987-99F9-EAF21F9D4140}

       Menu Editor
       1.2.6
       true
        

       Microsoft .NET Framework Assistant
       1.2.1
       true
       {20a82645-c095-46ed-80e3-08825760534b}

       MultirowBookmarksToolbar
       5.0
       true
        

       OpenBook
       2.0.1.1
       true
        

       Toolbar Buttons
       0.6.0.8
       true
       {03B08592-E5B4-45ff-A0BE-C1D975458688}

       Update Notifier
       0.1.5.5
       true
       {95f24680-9e31-11da-a746-0800200c9a66}

       Firefox Sync
       1.4
       false
       {340c2bbc-ce74-4362-90b5-7c26312808ef}

       Adblock Plus
       1.2.1
       true
        

       Download Statusbar
       0.9.7
       true
        

       Tab Utilities
       0.9.9.3
       true
       tabutils@ithinc.cn

       SyncPlaces
       4.0.7
       true
       syncplaces@andyhalford.com

       Java Console
       6.0.19
       true
        

       Java Console
       6.0.20
       true
        

 Modified Preferences

     Name

     Value

       accessibility.typeaheadfind.flashBar
       0

       browser.history_expire_days.mirror
       180

       browser.history_expire_days_min
       5

       browser.places.importBookmarksHTML
       false

       browser.places.importDefaults
       false

       browser.places.leftPaneFolderId
       -1

       browser.places.migratePostDataAnnotations
       false

       browser.places.smartBookmarksVersion
       2

       browser.places.updateRecentTagsUri
       false

       browser.startup.homepage
       http://www.deviantart.com

       browser.startup.homepage_override.mstone
       rv:1.9.2.6

       browser.tabs.loadInBackground
       false

       browser.tabs.warnOnClose
       false

       browser.tabs.warnOnOpen
       false

       extensions.lastAppVersion
       3.6.6

       general.useragent.extra.microsoftdotnet
       ( .NET CLR 3.5.30729)

       network.cookie.prefsMigrated
       true

       network.protocol-handler.warn-external.ed2k
       false

       network.protocol-handler.warn-external.lastfm
       false

       places.last_vacuum
       1274688445

       print.print_printer
       FinePrint

       print.printer_FinePrint.print_bgcolor
       false

       print.printer_FinePrint.print_bgimages
       false

       print.printer_FinePrint.print_command

       print.printer_FinePrint.print_downloadfonts
       true

       print.printer_FinePrint.print_edge_bottom
       0

       print.printer_FinePrint.print_edge_left
       0

       print.printer_FinePrint.print_edge_right
       0

       print.printer_FinePrint.print_edge_top
       0

       print.printer_FinePrint.print_evenpages
       true

       print.printer_FinePrint.print_footercenter

       print.printer_FinePrint.print_footerleft

       print.printer_FinePrint.print_footerright

       print.printer_FinePrint.print_headercenter

       print.printer_FinePrint.print_headerleft

       print.printer_FinePrint.print_headerright

       print.printer_FinePrint.print_in_color
       true

       print.printer_FinePrint.print_margin_bottom
       0.5

       print.printer_FinePrint.print_margin_left
       0.5

       print.printer_FinePrint.print_margin_right
       0.5

       print.printer_FinePrint.print_margin_top
       0.5

       print.printer_FinePrint.print_oddpages
       true

       print.printer_FinePrint.print_orientation
       0

       print.printer_FinePrint.print_pagedelay
       500

       print.printer_FinePrint.print_paper_data
       1

       print.printer_FinePrint.print_paper_height
       11.00

       print.printer_FinePrint.print_paper_size
       2097196

       print.printer_FinePrint.print_paper_size_type
       0

       print.printer_FinePrint.print_paper_size_unit
       0

       print.printer_FinePrint.print_paper_width
       8.50

       print.printer_FinePrint.print_reversed
       false

       print.printer_FinePrint.print_scaling
       1.00

       print.printer_FinePrint.print_shrink_to_fit
       false

       print.printer_FinePrint.print_to_file
       false

       print.printer_FinePrint.print_unwriteable_margin_bottom
       0

       print.printer_FinePrint.print_unwriteable_margin_left
       0

       print.printer_FinePrint.print_unwriteable_margin_right
       0

       print.printer_FinePrint.print_unwriteable_margin_top
       0

       privacy.clearOnShutdown.cookies
       false

       privacy.clearOnShutdown.formdata
       false

       privacy.clearOnShutdown.sessions
       false

       privacy.cpd.cookies
       false

       privacy.cpd.sessions
       false

       privacy.sanitize.migrateFx3Prefs
       true

       privacy.sanitize.sanitizeOnShutdown
       true

       privacy.sanitize.timeSpan
       0

       security.warn_viewing_mixed
       false

No problem. We need to troubleshoot problems systematically, and need to determine if that problem with Firefox itself or if it with an addon or combination of addons?

Did you try the Firefox SafeMode (a troubleshooting mode that disables extensions), as I asked about on May 5th?

If it works fine in the Firefox SafeMode, then we'll know that whatever is causing your problem was not in use while in the Firefox SafeMode.

Then you need to figure out what was causing that problem by troubleshooting your addons.

Yeah, I tried that on may 19th (see my post somewhere above, it got a bit "snowed under" in all the Anonymous-postings), but unfortunately to no avail; the problem still occurred while running in Safe Mode; I also tried disabling all add-ons and plugins, after which the problem also still occured :(

To me, this would seem as if the problem is caused by something relatively unrelated to Firefox, add-ons or plugins... which could mean that we're looking for a needle in a haystack :-S

• ouch*

I think I just found the needle (at least for _my_ haystack, I don't know about the other users who posted here with the same problem)...

The behaviour of Firefox got me thinking: it really looks like some kind of strange mouse-behaviour; it's almost as if I can't move my mouse pointer quick enough to get to the right-click context menu to give it focus and then select an option. So, what kind of software do I have installed on my computer that does something with mouse pointers and focus? Exactly, TweakUI and the "X-mouse" option...

Lo and behold, after disabling the X-mouse option in TweakUI, my problem in Firefox is solved...

I am wondering though, is this something that can/should be fixed in Firefox? By this, I mean that in all other cases in Firefox (i.e. when you right-click on a menu-item, on an item in the navigation toolbar, on a bookmark that is directly in the bookmark toolbar or when you right-click somewhere on a displayed page, an image or a hyperlink or whatever), the right-click menu doesn't disappear, even with X-mouse enabled. So it seems as if the original scenario is the only deviation from the standard. I don't know if this should be considered a bug or a glitch however; I don't know anything about Firefox's underlying GUI model and if this is to be considered correct behavior, but perhaps it's worth looking into :)

For now, I can live happily ever after with the knowledge that I should either disable X-mouse or live with the problem in Firefox ;)

Thanks to everyone who looked into this subject!

You Da Man Martin!!! Tweak UI X mouse was the problem. Thanks!

BTW Sorry about being anonymous, I am a registered user but lost my log in stuff.

Will this problem be fixed?

I have been running Firefox and TweakUI with X-Mouse enabled for years on Windows XP Pro. Firefox did not have this problem prior to version 3.6. The problem was introduced in Firefox 3.6 and should be fixed in Firefox.

Look for the difference between the relevant code in version 3.5.x and 3.6.

I had exactly the same problem. Yes it was due to TweakUI/X-mouse. However I didn't have to disable X-mouse. I have just added a 10 ms delay and it solved the problem.

However, I really don't understand why an upgrade on Firefox having zero ms delay on X-mouse had a problem.

I know of a couple of fixes I have used for this issue.

XP:

Using tweakui from M.S. you may set your mouse to function as an x-mouse. This will make regedits (i believe) and enables the window beneath your mouse to become active.

In this same tool is an option to set a "delay" before activation
I have used a delay somewhere around 300 ms. successfully.

Windows 7

I had the same problem after migration from XP. To fix it I went to:

   control panel->Ease of Access->Make the mouse easier to use

I toggled OFF and ON the option:

    "Activate a window by hovering over it with the mouse"

saving my choice after each toggle. (I then set my selection back to ON, but you do as you wish.)

I hope you have success as I did.