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I have firefox upgraded to 9 and then 10. Q installed on ubuntu lucid.

Now when I save an htm file it gets saved as When an image is saved it is saved as Same thing happens for pdf files as well.

Why does this occur? Is this a bug in FireFox? The problem happened since I upgraded to FireFox 9 from previous version.

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Does this happen on any site, also e.g. on Super User? Or is it only a specific site that has .py URLs? – Daniel Beck Feb 9 '12 at 9:45
if I try File->save Page As for this (superuser site) page, it shows as .However,if I try save Link As on let's say the ASkQuestion link above, it shows as ask.htm . – jimgardener Feb 11 '12 at 3:36
This is happening with me as well on a Linux machine. On a Windows machine it appends .rb extension. Am using Firefox 10. – Barun Feb 19 '12 at 15:41
up vote 1 down vote accepted

Ok, I had filed a bug against this on the Mozilla site, and got it resolved: Bug 728690 - Adds .py extension while saving files

The problem was caused by the Selenium IDE: Python Formatters extension. Things worked fine on disabling it.

Disable all "Selenium IDE: XXX Formatters" extensions if you have more than one.

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