Some keys do work in Edge but not in Firefox

Online experiments
1

Hi there,

I have a problem with the Firefox browser detecting certain keys as defined in the builder. More than happy to provide more info if necessary. At the moment, I have no idea how to proceed.

My first online experiment uses the “A” and the “L” keys as main response keys. I thus added a keyboard response component in the builder and defined the allowed response keys in the following manner: ‘a’,‘l’ . (the l is an L not an i)

Everything runs smoothly offline. Only the A and the L key are accepted as responses. I then uploaded the experiment to pavlovia. Everything runs smoothly on Edge. Everything runs smoothly on Firefox… except for the L key. It would only accept the A key. I tried switching positions to ‘l’, ‘a’: nothing changed. I then allowed all keys to work. Interestingly, the L still did not work. Some other keys also would not work (however, after pressing wildly, eventually, all keys magically worked at some point - but not anymore after restarting the experiment).

Does anybody have an idea how to fix this?

Thanks for reading,
Patrick

2

Please could you try adding KeyL and KeyA as additional valid responses. I’m not sure if this solution is still relevant but I got it from here: Problem running an online study

3

Thanks for your response! It did unfortunately not do the trick.

…I however realized that I still had the Firefox Vimium Addon active. Apparently, it suppresses the L key but not the A key. Deactivating it now fixed my issue. I had no idea how fragile scripting in JS for browsers is.