"Add-ons Manager" automatically launches on start up

Every time I open FireFox i get a tab for "Add-ons Manager" in addition to a tab for my home page. How can I suppress the undesired launch of "Add-ons Manager"? It is kind of a nuisance.
Thanks,
joe

One possibility is that about:addons got added to your home page as a second "home tab" somehow. You can review your home page setting and look for that tacked on after a vertical bar (|). This article describe that in more detail: [[How to set the home page]].

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Extensions will not show in add-ons manager; Firefox start-up Java error

When I click Tools --> Add-ons, the Add-ons Manager opens but no Extensions show in the Extensions tab.
I think the problem is related to a start-up error message I receive. Every time I open Firefox, an error message labeled "[JavaScript Application]" opens and displays the following:
aObj is undefined -- chooseValue((void 0),"name")@resource:///modules/XPIProvider.jsm:7032
()@resource:///modules/XPIProvider.jsm:7142
([object Object])@resource://yoono/yoonoLog.js:95
([object Object])@resource://yoono/yoonoLog.js:49
()@chrome://yoono/content/yoonoOverlay.js:176
()@chrome://yoono/content/yoonoOverlay.js:88
([object Array])@resource://yoono/yoonoService.js:949
safeCall((function (aAddonList) {try {for (var i = 0; i < aAddonList.length; i++) {_self.addOns[aAddonList[i].id] = aAddonList[i];if (YOONO_ID == aAddonList[i].id) {_self.setExtensionVersion(aAddonList[i].version);}}} catch (e) {CONSOLESERVICE.logStringMessage(e);}aCallBack();}),[object Array])@resource://gre/modules/AddonManager.jsm:50
([object Object])@resource://gre/modules/AddonManager.jsm:964
AOC_callNext()@resource://gre/modules/AddonManager.jsm:120
([object Array])@resource://gre/modules/AddonManager.jsm:959
PL_getAddonsByTypes(null,(function (aProviderAddons) {"use strict";addons = addons.concat(aProviderAddons);aCaller.callNext();}))@resource:///modules/PluginProvider.jsm:110
callProvider([object Object],"getAddonsByTypes",null,null,(function (aProviderAddons) {"use strict";addons = addons.concat(aProviderAddons);aCaller.callNext();}))@resource://gre/modules/AddonManager.jsm:78
([object Object],[object Object])@resource://gre/modules/AddonManager.jsm:957
AOC_callNext()@resource://gre/modules/AddonManager.jsm:126
([object Array])@resource://gre/modules/AddonManager.jsm:959
([object Array])@resource:///modules/XPIProvider.jsm:3094
completeAddon([object Object])@resource:///modules/XPIProvider.jsm:3895
getAddon([object Object])@resource://gre/modules/AddonRepository.jsm:504
("[email protected]",completeAddon)@resource://gre/modules/AddonRepository.jsm:536
([object Object])@resource:///modules/XPIProvider.jsm:3899
((function (aAddon) {"use strict";
function completeAddon(aRepositoryAddon) {aAddon._repositoryAddon = aRepositoryAddon;self.addons.push(aAddon);if (self.complete && self.addons.length == self.count) {self.callback(self.addons);}}
if ("getCachedAddonByID" in AddonRepository) {AddonRepository.getCachedAddonByID(aAddon.id, completeAddon);} else {completeAddon(null);}}),0,[object Array])@resource:///modules/XPIProvider.jsm:4796
(0)@resource:///modules/XPIProvider.jsm:4795
Any and all help would be much appreciated.
-Jason

The error means that an add-on called yoono is having problems communicating with a component made by Microsoft. I spoke to somebody with experience in working with the firefox coding, and he said that they're likely to be different issued and to see if yoono or another extension is causing the problems by opening firefox in safe mode. To open firefox in safe mode, [[Safe Mode|click here]]. If you can get to the addon manager there, I recommend you get rid of yoono

How do I stop Firefox from launching Add-ons manager?

I do not like having extra tabs open and add ons manager keeps opening automatically. How can I stop this?

Firefox 8 i am on and its doing the same,very annoying,ill be going back to previous version...
do you guys at Firefox ever check your update's on any of your own computers before you release them?
might be a good idea,its the same with kylo,updates come screw everything up when they were working fine...im am a house builder,if i built houses with this many errors i'd be bankrupt by now....

After automaticly updated to the version 7 the extensions page in the Add-ons Manager went blank and give this sentence "you don't have any add-ons of this type installed" but all the add-ons still working in the program

All the add-ons I had installed for the version 3+++ still working at the version 7, but the problem is that the extensions page in the add-ons manager is blank except a sentence that says "You don't have any add-ons of this type installed"

https://support.mozilla.com/en-US/questions/826729 has a solution for the problem

The Add-ons Manager will not display!

I've been having an intermittent problem with certain features not displaying at all. First it was that I could not "Customize" my toolbar for quite a while. It finally returned suddenly, in FF v4.01, after being unavailable since v3.5.
I've also been without the Magnifying Glass search icon since v3.5, which is still missing. And the show "Properties" option has also disappeared from the Right-Click Context menu, I don't remember if it started in FF v3.x , but I think it was right after upgrading to v4, and it hasn't returned since either.
Now it's the Add-ons Manager that has quit working. It has happened a few times before, but quitting and restarting Firefox brought it back.
This time, however, it seems to be completely disabled. I had just removed the IE Tab Plus extension, to be sure I hadn't installed it over the original IE Tab, which they said could cause unpredictable issues.
Next I used "Install Extensions" from the File menu of the Add-ons Manager tab, and selected a copy of IE Tab Plus I had saved to disk last October 2010 to re-install it. But nothing seemed to happen. No pop-up, or any indication/notification that an extension was about to be installed - nothing.
So I did a search for IE Tab Plus to acquire the latest version from it's Mozilla Add-ons page, where I noticed a "Comment" claiming the IE Tab Plus author was using it to secretly install Ad-ware, and recommended using IE Tab 2 instead.
I decided to do as suggested, but there is no link on the page to install IE Tab 2 from either. I decided to quit and reload Firefox, yet even in Safe Mode, I still can not get the Add-ons Manager Tab to load.
Note:
I also have Mr. Tech's cool Toolkit extension, which I believe added the "Extension Options" item to the Tools menu, and it is also empty now. It was not empty just before this. In fact it still displayed my extensions list after the Add-ons Manager had already failed to load again at all.

Start Firefox in <u>[[Safe Mode]]</u> to check if one of the extensions is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
* Don't make any changes on the Safe mode start window.
* https://support.mozilla.com/kb/Safe+Mode
This can be a problem with the file(s) that store the extensions registry.
Delete the files extensions.* (extensions.sqlite, extensions.rdf, extensions.cache, extensions.ini) and compatibility.ini in the Firefox [[Profiles|profile folder]] to reset the extensions registry. New files will be created when required.
See "Corrupt extension files": http://kb.mozillazine.org/Unable_to_install_themes_or_extensions
If you see disabled, not compatible, extensions in "Tools > Add-ons > Extensions" then click the Tools button at the left side of the Search Bar (or click the "Find Updates" button in older Firefox versions) to do a compatibility check or see if there is an update.

Why does add-ons Manager create a new tab every time I go to home page?

When I start Firefox my home page tab shows up along with an add-ons Manager tab and a plus sign for new tab. Every time I go to a web site and then return to my home page ANOTHER add-ons Manager tab shows up. This apparently will go on forever. I have had as many as 20 add-ons Manager tabs showing. The only way to eliminate them is to stop Firefox and then restart. Then it starts all over again. What is causing this?
I'm running the latest version of Firefox and Windows 8.1 on a Dell Inspiron with 8G's of memory and a 1T hard drive.
Please help.

Can you post back here a screenshot from this issue?

Firefox 10 Add-Ons Manager does not open in a tab

In later versions of Firefox 9 and now Firefox 10, the "Add-Ons Manager" refuses to open in a tab. Instead, it opens as a window with no border that will not move and cannot be moved or closed except by closing it from the Start Bar at the bottom of the screen.
This occurs on 2 separate PCs, one running Vista, one running XP.
I know it should open as a Tab, but I see no way to do this.
Do I need to change some setting to get it to open properly?
Thanks,
Ken West

updates 9 and 10 have caused me problems as well with add ons and the extra tab appearing welcoming me to firefox.
With update 10 all my add ons disappeared.. upon going to tools /add ons I found half my add ons were incompatable and the others were closed! I just opened them again and all was fine. Luckily the add ons I use often were still compatable.
The other option is to just add them again if they are compatible.. if not you can get around it by googling and comming up with a solution there somewhere.. One I use a lot is download helper and I had to do this about 3 versions ago to get it running.
There could be a solution in Help/trouble shooting and looking at extensions.. your add ons should be listed there and all be True..
If not you will most probably have to open Containing folder in top block and do something there.. Not sure what but will leave it up to the experts..
Seriously it would most probably be quicker to reinstal you add ons.

Why does the Add-ons manager take an excessive time to load and can I view my add-ons without going to the add-ons manager?

When I start my browser up my everything that I have been working on comes up without any problem and I can open a new tab to go to another site without a problem, but when I go to the Add-ons Manager it can take over 3 minutes to load and that's if I don't stop it. My other question is can I view my add-ons, plugins, etc without having to open the Add-ons Manager?

Check out this similar thread: [https://support.mozilla.com/en-US/questions/836711 Some websites, Mozilla included, appear to think I'm using a different version of Firefox from the one I am using; how can I fix this? | Firefox Support Forum]. Does that help?

Why can't I access extensions thru Add-ons Manager?

I just upgraded to version 8 on WinXP. Flagfox extension died on start up, so I tried to uninstall and re-install as suggested. However, Add-ons Manager says I have no Extensions, but Tools Menu lets me access and configure a number of extensions.

Well, after restarting Firefox enough times, everything seems to have gone back to normal. I even have extensions listed in the Add-ons Manager. I guess I have a successful upgrade to version 8, but it wasn't a pleasant experience.

Foxfire 6.0 add-ons manager not working, says "loading", get nothing, now what?

Just received an update and some add-ons were disabled. Clicked on "Tools", "add-ons". Tab opens and says "Loading" but nothing loads and I can't do anything with add-ons manager. Is there a fix?

Thanks for the suggestions. When you click on Tools and then Add-ons, theAdd-on Manager launches, and by default "Get Add Ons" is selected. Although I was not getting any response other than "Loading", if I then click on Extensions or Appearance or Plugins, I was getting a proper response from those three. After doing that and closing out Add-ons Manager and then relaunching it, my original problem disappeared. Now everything works fine. I tested it multiple times and is still OK. Can't explain it but OK for now. Maybe the Get Add-ons portion of the Web site was down at the times I was testing it? I'll keep a watch on it. Thanks for your speedy reply.

How to hide (not disable) one or multiple extension(s) in Add-ons Manager?

I have installed Play Music 1.6 on my computer. However, this extension shows up in the Add-ons Manager of my computer. I don't want anyone to be able to see the description nor disable this extension. My nephews use my computer frequently and I want to make sure they are not going to inappropriate websites.

Note that you still see the extension on the "Help > Troubleshooting Information" page and that starting in Safe mode will disable it like all other extensions (i.e. starting with Shift pressed is sufficient).
*https://support.mozilla.org/kb/Using+the+Troubleshooting+Information+page

Why does Firefox add-ons manager install old version of LastPass?

After using Chrome in MS Windows for four years I have recently been considering a return to Firefox as my primary web browser.
After installing Firefox v26.0 my first requirement was to get the LastPass add-on, which I did via Firefox's "Add-Ons Manager". I signed in to my LastPass account and all should now have been well.
Not quite. Whenever I launched Firefox and logged in to LastPass, Firefox would hang for about a minute. The same occurred when I updated or created a LastPass record.
Then I checked the version of the LastPass plug-in: 2.0.20, built 2013-02-08. That's from eleven months ago!
I tried the update feature on the LastPass add-on menu, but it did nothing, so I went to LastPass.com and downloaded the latest version (3.0.12, built 2013-12-03). After a restart all was indeed well.
I had the exact same experience with Firefox on Linux, by the way.
Question: Why does the Firefox Add-Ons Manager point to an extremely out-of-date version of the LastPass Toolbar? Is this the fault of the Mozilla team or of LastPass themselves?
Whoever is at fault, it must be corrected and soon. I very nearly gave up on my switch back to Firefox because of this. I'm sure others will have had the same experience.

hello Jesse_Penny, thanks for your insight - according to [https://blog.mozilla.org/addons/2014/01/08/add-ons-update-42/ public information] from mozilla's addons team, reviews for updated addons at addons.mozilla.org currently take around 5 days - so i don't know if this would warrant pulling out of AMO, which causes the issues the question owner has described...

I want to disable plugins, which i can do through add-ons manager, but every time i restart firefox they are enabled again

When i disable plugins firefox runs faster. I could uninstall the plugins, but i periodically want to use them. I have tried using click to play but i want some plugins to run automatically.
I want to disable selective plugins and have some enabled. When i do this via add-ons manager, all plugins are enable on restarting firefox.

i don't use any cleanup tools & MSE is my security software, which is rather unobtrusive and shouldn't interfere here...
i currently have one blocklisted plugin (see screenshot), but if i remember it correctly the problem was already present in my case before i had the outdated acrobat plugin installed.
sometimes when you enable/disable a plugin in the addons manager & press f5 afterwards, it immediately switches back to its old state/sometimes it will stay on the new state until a restart of the browser & in some cases it will remember the state even across sessions - it's just not working reliably in any way.
as far as i can observe the pluginreg.dat file in my profile folder the change of a plugin's state isn't written to the file as soon as it's toggled in the UI during a session, but only when the browser is getting closed - so the information has to be in the memory somewhere before and might be getting corrupted. i suspect it might be a general bug but i cannot reproduce it reliably .
''edit: forgot to attach the screenshot & i'm using the current aurora build''

After Firefox 6 upgrade, Add-ons Manager does not load, it just says "loading" forever

nothing to add

Thanks for the suggestions. When you click on Tools and then Add-ons, theAdd-on Manager launches, and by default "Get Add Ons" is selected. Although I was not getting any response other than "Loading", if I then click on Extensions or Appearance or Plugins, I was getting a proper response from those three. After doing that and closing out Add-ons Manager and then relaunching it, my original problem disappeared. Now everything works fine. I tested it multiple times and is still OK. Can't explain it but OK for now. Maybe the Get Add-ons portion of the Web site was down at the times I was testing it? I'll keep a watch on it. Thanks for your speedy reply.

Add-ons Manager has no text

I just downloaded Firefox RC1.
When I open the Add-ons Manager and go to Get-addons i see no text, only images.

fc-cache -f -v
fixed the problem.

"Add-ons Manager" automatically launches on start up

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