OK, but more powerful alternatives exist Rated 3 out of 5 stars

I second the opinion of previous reviewers: while for some the crude one-size-fits-all approach might suffice, there are many users who are more discerning and need a finer degree of control. (Two stars dropped to reflect the needs of these users to what otherwise might be a worthwhile addon.)

For those who are currently missing support for a black- / whitelisting feature etc you may want to consider using the NoScript addon and stop sites (after a certain timeout) via a so-called "Surrogate Script".

--- EDIT (in response to developer's comment) ---

My perspective: I wanted to "killspin" (might have preferred "stopspin", but catchy name anyway) a specific website after two seconds. That is, all the fuss about one single website (which I check regularly). Your addon might be lightweight, but is literally overkill if all I'm interested in is to tackle a single specific website. For websites which are not part of my daily intake _and_ misbehave, hitting the Esc key does the trick well enough.

But all this is just one single user's perspective...

This review is for a previous version of the add-on ( 

Whitelisting is available

the controversy is about blacklist mode... which seems to reflect some kind of misunderstanding about the way the add-on function on sites that load in reasonable time ;-(

Edit: again, there is no overhead in normal sites, all the add-on does is to check if the page finished loading after the timeout. one "if" and we're done (to check if the site is blacklisted would take much more!). But all this is just one baffled developer's perspective...

Works well! Rated 5 out of 5 stars

Whatever other reviews are saying I'm having great success so far with KillSpinners using FF v39.0 on Mac OS 10.6.8, I hadn't needed an add-on like this until a couple of days ago when web pages started refusing to complete their loading, for unknown reasons (same with other browsers too). I'm assuming it's some sort of network problem out of my control and hope that it gets resolved. In the meantime I came across KillSpinners during my web investigations.

The developer's description isn't very clear but basically once it's installed it times every pages load time and if any go over a user-defined threshold it stops the page loading and displays a notification toolbar to tell the user it's stopped the loading. The toolbar helpfully has 2 option buttons on it plus a "x" to cancel the toolbar. The buttons are; Allow the page to keep on loading for this time only and Options. This button brings up a pop-up menu allowing you add that page to an exceptions list so that KS will ignore that URL in future (the list can be edited manually too) plus prefs. etc. The toolbar also usefully reminds you of the time out setting you're using - I've set mine to 20" which seems ideal.

So far I haven't found this add-on interfering with any other add-ons I have or other FF functionality. Therefore it's 5 stars from me!

This review is for a previous version of the add-on ( 

Gotta do a blacklist! Rated 3 out of 5 stars

Seriously man, you gotta add a blacklist and stop thinking you know how ALL people use their browsers and what they want this extension for. You're a good dev, but a long ways away from an all-knowing god, no?

UPDATE. This is my reply to the comment dev left on May 29, 2015.
You don't "must" do anything. It's just a feature request, not a forceful requirement. But it's not just me asking for that feature, it's hundreds of other reviewers here. I thought perhaps my usage was unusual in my earlier comment, but I now see literally hundreds of other people asking for the same thing, so I guess it's not so unusual. Like I said before, I only have one site I need this for, but yet am being forced to whitelist hundreds of others, those that I don't need this for. I'm also not a dev by any means, so your earlier suggestion to code my own extension or edit this one is a bit unrealistic. I rely on people like you, I don't code myself.

This review is for a previous version of the add-on (  This user has a previous review of this add-on.

Seriously man, use your browser as you wish...

but where did you get the idea that i "must" tailor this add-on to your likings?
you haven't given any ---reasons--- why you think you need this...

It could have been an excellent add-on, but... Rated 2 out of 5 stars

My hope in a future release including such a feature is gone because of a recent developer's reply to other users asking for the same thing... so, I have to realize that this addon will remain as-is with no further improvement.

@yochaim: you have said that "blacklisting doesn't seem to go well with the concept of this add-on"... so, why did the developers of many other add-ons like NoScript include this feature?
It's a user preference to operate in whitelisting or blacklisting mode, depending on his own needs and daily usage of the browser.
Add-ons are meant for this: customizing the users' browsing experience to delight the most wide range of tastes and preferences as possible.

This review is for a previous version of the add-on ( 

This is a valid opinion although i hold a different one...

The reason i don't think this is comparable to other add-ons like noscript, flashblock etc (which i think should have blacklist option) is that they change page behavior by default. Killspinners does nothing when sites behave normally and change very little when sites load slow (usually it prevents social widgets and ads stuff that takes long to load...)

Rated 5 out of 5 stars

Not bad addon,i have sugestion,for this addon,not sure if development of this addon is still actual,but here is the idea,there is whitelist,ok ... so what about create also blacklist and put there specific sites,with specific loading times for each web site.I actualy need this addon only for 1 web site,so clicking on every web site,to add it whitelist,or click allow instead,i do like welcome button ignore other webs than in blacklist,i know sounds komplikated,but i think its possible to doit.Thanks. ps:i hope this make sense.

This review is for a previous version of the add-on ( 

See link below for the discussion in the support site...


Autohide would be nice Rated 5 out of 5 stars

Would be perfect if notification bar autohided, let's say in 5-10-20 sec.

This review is for a previous version of the add-on ( 

Rated 5 out of 5 stars

good addon

This review is for a previous version of the add-on ( 

suggestion Rated 5 out of 5 stars

Good addon.
Can you add the option:
1) "stop loading BACKGROUND pages after x seconds"

2)put the button "allow spinner" in the addons bar.
it uncomfortable click two button: option-->allow spinner


This review is for a previous version of the add-on ( 

2 clicks is really much too much ( allow button seems good to me)

as for background tabs, please elaborate in the support site...

Rated 5 out of 5 stars


This review is for a previous version of the add-on ( 

Feature Suggestion: exception for browser startup Rated 4 out of 5 stars

when you first restore tabs it may take longer for all of them to load so i suggest an exception to let tabs get a longer time to load on browser start.

This review is for a previous version of the add-on ( 

A "Reload Tab Every" tab spin all night with 12,5% CPU load Rated 5 out of 5 stars

## A "Reload Tab Every" tab spin all night with 12,5% CPU load

Sometimes when Firefox is minimized I see in my ProcessHacker.exe tray icon that firefox.exe use 12,5% (which is probably has done all night, wasting CPU power and indirectly heating the GPU and other components through the increased air temperature) instead of the average 0,5% CPU

When I restore the Firefox window from minimization a page that use "Reload Tab Every" 30 min is spinning

When I press Esc (Stop) the tab icon stop spinning and the firefox.exe CPU load goes back to 0,5%

## No setting solve this problem

I haven't found a setting in about:config that solve this problem

This review is for a previous version of the add-on ( 

At last! At last! Rated 5 out of 5 stars

Oh, thank you! Thank you, thank you, thank you.

I've been looking for an extension that does this for ages. And to think, all I needed was to hit on the right search terms to find this wonderful add-on.

I am assuming that the person who asked (paraphrasing) "Why would you want to do this?" is fortunate enough always to have a new and fast computer. I, alas, am not, and I was not having any fun at all sitting and waiting and pounding on the "abort load" button in vain while, even though the meat of the web page -- what I actually wanted to read -- had already loaded, I still had to wait forever while Firefox desperately tried to access Google and Facebook and Pinterest, and God only knows how many other annoying social media sites that never actually finish loading. As if I care how many stupid "plus ones" or "likes" a web page has received! I just want to read the *content*, y'know? But half the web pages I navigate to these days actually freeze up my computer with all those social media calls, forcing me to use drastic measures to shut Firefox down just to break the freeze.

You have saved my web browsing experience, and made it possible for me to return to sites that I had been forced to abandon altogether because of this problem. Now I can access them again. Hurrah!

This review is for a previous version of the add-on ( 

Rated 2 out of 5 stars

How exactly is this even a good idea? You're literally saying "when any webpage takes longer than this random number of seconds to load, something must be wrong and the solution is to interrupt the loading".
1) if you're targeting bulky Flash ads, it could very well be that the Flash is only a widget that's loaded instantly and then loads a stream from a server in its own process, avoiding the browser's meddling (like in the case of Flash video viewers).
2) networks and connections can be slow sometimes, making the page loading exceed the arbitrary number of seconds.
3) page loading time only (vaguely) indicates the size of the content, not whether or not that content is essential or unneeded

From the looks of it, literally the only purpose is to get rid of tabs that keep spinning for longer than x seconds, regardless of the cause, tab's contents, etc. How is that useful?

This review is for a previous version of the add-on ( 

about:addons Rated 5 out of 5 stars

Great addon, tnx!
Only you should add exception for "about:addons", cose sometimes KillSpiners self activate in addon window. Btw, I set timeout to 10 sec.

This review is for a previous version of the add-on ( 

Brilliant Addon Rated 5 out of 5 stars

Amazing concept totally inline with todays ad/flash-heavy websites which tend to cause problems of that indefinite spinning.I dont know how i missed out this addon for almost 2 years since its inception.Though there is 1 thing that i found strange , may be or may not be its a bug :An imacro bookmark on toolbar has to be doubleclicked instead of the usual single click once "KillSpinners" is installed. Also disabling KillSpinners does not get rid of this, you have to restart mozilla after disabling it to enable back the single click functioning of imacro bookmarks.Thanks a ton.

Additional Info:
Hi yochaim You can use the following steps to reproduce the problem:
1) Install imacros addon.
2) Click on its icon on Navigation bar, which will show up a side panel
3) Expand demo-Firefox
4) Right Click on any macro and add click "add to bookmark"
5) This will open a pop up asking you where to put the macro as bookmark, Near "Add to firefox bookmarks" there will be a dropdown menu, select "Bookmark Toolbar" instead of menu.
And now you can reproduce the problem.

The trouble is that when killspinners is disabled(and restarted) you can open imacro bookmarks with single click, while after activating the addon you need to double click the imacro bookmark. I hope you will fix this trouble soon.

This review is for a previous version of the add-on ( 

i'll look into it...

traced your steps but everything worked ok (including bookmarklets). if you could create clean profile and add only these 2 add-ons that would be helpful.

please continue this on the support site...

Now only on background tabs? Rated 5 out of 5 stars

This add-on is absolutely brilliant :-) One question though, is the addon now only watching background tabs. For me it does not seem to work on active tabs - any way I could change this behavior?

This review is for a previous version of the add-on ( 

Should not do that...

please try changing the timeout to 5 secs and recheck.
if you still see a problem let me know in the support site...

nice Rated 4 out of 5 stars

it is a good idea and an okay addon but i guess it needs some improvement to be used better.

-maybe an option to ignore the focused/active tab and only stop spinners of inactive/background tabs
-it would be nice if the addon could detect is the tab currently really loading something like an image or javascript or css etc and kill the progress if it finds it idles. maybe options for selecting exactly the content that it is allowed to load and the content where loading will be killed. maybe the application can also do something like detect overall download speed and if there is no download (or upload) progress (after a defined timeout), kill the spinner.

the problem i am having is that i am on a slow connection but i do get idle tabs that hang sometimes. the idea of stopping these background idle tabs from hogging my connections and network speed is nice but the problem is that i will sometimes also open multiple tabs in background from a heavy site and these will need much, much time to finish loading. but the addon would just kill them without much process. maybe an advanced version of the addon could be made that will detect the progress of content that is being downloaded and after the idle time seams hopeless, brake the link.

the addon is fine the way it is but i figure it wouldn't hurt to add some ideas that could be used for further improvement.at the moment, i cannot use this much on my connection but other then that, im sure this can be a useful addon in certain situations. i apreciate the effort : )

This review is for a previous version of the add-on ( 

thanks for the detailed review

i'll consider exuding current tab and checking for multiple loads...
for now you can increase the delay time or add exception for slow sites...

Great addon!! Rated 5 out of 5 stars

I hope this one doesn't die. Is there a need to update this one? I just hope somebody can make an add on that blocks fb games.

This review is for a previous version of the add-on ( 

Awesome Addon Rated 5 out of 5 stars

Thanks for this addon, it works like charm, it just would be great if you could add an option to filter some webpages, i.e. i´m working on my joomla admin and some extensions delay more time, so the addon kills the procees and you need to change the values of the addon, and when you finish you have to change the values again and so on, really hope next version have a little more option like this. Thanks a lot!

This review is for a previous version of the add-on ( 

Working on it...


Rated 5 out of 5 stars

lightweight addon @11 kb

My Usecase :

Tab loading Process controlled by "Load tab progressively" addon , takes too long , due to spinners.
This addon helps to postpone the loading of spinner tabs , by killing it

This review is for a previous version of the add-on (