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Keyboard not recognised in Firefox 9

8 comments (Add new comment)
Posted 24th Dec 2011 at 11:25
Hello Gareth,

I recently upgraded to Firefox 9, and now I can't play the "games" on your site that require keyboard input (e.g Sudoku), as keys pressed (numbers, spacebar, arrows) have no effect.
Mouse-input still works fine.

Is there anything your rely on to be installed in order for your website to work?


P.S. Happy holidays, and keep up the good work (love your puzzles)

Posted 30th Dec 2011 at 16:30
I've got exactly the same problem problem with Firefox 9. It has to be a firefox upgrade bug so I have posted a question on their site. In the meantime I will be going in through Internet Explorer which works fine.
Posted 1st Jan 2012 at 20:50
peetee Daily subscriber
same thing here IE works ok
Posted 2nd Jan 2012 at 21:32
Last edited by gareth 2nd Jan 2012 at 21:32
gareth Administrator Daily subscriber
Thanks for the above reports, and thanks also to the people who've reported this on the Firefox website.

There seems to be a change in Firefox 9 which means the player doesn't receive keyboard input until you click something else on the page that causes a change. I think this is caused by an over-zealous optimisation by the Firefox developers - someone not properly thinking-through the consequences of their changes.

As a workaround you can click on 'pencilmarks' at the top of the right-hand panel in the player and then it will start working. You may want to click 'solution' next to switch back to full digits (or hit space).

Gareth, puzzlemix

Posted 3rd Jan 2012 at 01:27
gareth Administrator Daily subscriber
I have now added a workaround which makes the players work in Firefox 9 again (it simulates clicking on the buttons as described above when the player first opens).

If anyone continues to have a problem with Firefox 9 (or indeed any problem with any browser!) please do let me know so I can fix it.

Thanks very much!

Gareth, puzzlemix

Posted 3rd Jan 2012 at 02:07
gareth Administrator Daily subscriber
More information:

This is a major defect in Firefox 9 which was known about before release but which no one bothered to fix and seems to be a result of their new "let's have a new version as often as possible" system. It will be fixed in Firefox 10 which is due out in a few weeks.

This bug has affected many other sites and caused lots of bug reports. See for example:
And the master report at

Firefox is a mess now. You might try using Google Chrome, Safari or even Internet Explorer.

Gareth, puzzlemix

Posted 5th Jan 2012 at 12:38
Many thanks for fixing this so promptly and for keeping us updated - even at 1 and 2 am!! Don't you sleep? Pity the people at Firefox aren't anywhere near as conscientious. Seems so wrong that you have to adapt your website to cope with their stupidity.

Love your site. You make everyone feel just like part of a big family!

Posted 1st Feb 2012 at 19:22
gareth Administrator Daily subscriber
Thanks for the kind comments - I'm really glad you like the site, and I'm working on some new updates for later in the year to hopefully improve both the community feel and also the range of puzzles.

I'm also very pleased to see that Firefox 10, which is now released for all users who previously had Firefox 9, has fixed this bug and that all of the player functionality is now working properly again.

Gareth, puzzlemix

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