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Debugging with no debuggers

Some of my users reported being unable to log in with certain mobile devices, such as Nintendo 3DS and PSP web browsers. Personally, I have 3DS and I was able to reproduce the problem ... but I do not know how to fix it.

Basically, all I can determine is that something is wrong with the AJAX code, which causes the form to be sent to the wrong place in the wrong format.

Now I had errors with Chrome (it turned out adware ) that I was able to debug using the developer tools, looking at the error console, and get the result from there.

But how can I do this for something that doesn't have such debugging tools? These are not just game consoles, and Steam In-Game Browser also cannot log in with my clearly erroneous AJAX code.

What steps, if any, can be taken to begin to understand these errors without using the built-in debugging tools?

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I had a similar problem when I had to debug an application that did not work on the iPad, where I did not have access to the Mac for debugging. Without knowing anything about the browsers you mentioned, I hope this gives some value:

1) Firebug Lite: https://getfirebug.com/firebuglite Firefox Javascript, -, , ,

2) . , , - overflow:scroll,

!

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Source: https://habr.com/ru/post/1545213/

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