If you have been using Mozilla Firefox for a long time now, you must have seen these .XPI files quite often. They are installation files for the Mozilla browser extensions only. They are archived files and can be used to get particular extensions for the Mozilla products. Once you install the extensions, you will be able to use their functionalities.
XPI files do not contain anything special or any kind of special coding. These files are only zipped with files that can be used by the Mozilla programs only. These files even may contain RDF, CSS, MANIFEST, JS and Image files in the zipped format.
We hope we helped you solve the problem with the XPI file. If you do not know where you can download the application from our list, click on the link (which is the name of the program) - you will find more information there on the location where to download the secure setup version of the required application.
There can be more reasons which determine that you are not able to open the XPI file (apart from the lack of the proper application installed).
First - the XPI file may be incorrectly associated with the application installed to support it. In this case, you need to change this association by yourself. To do this, right-click on the XPI file that you want to edit, click "Open with" and then select the program from the list that you have installed. After this operation, the problems with opening the XPI file should be solved.
Second - the file you want to open can simply be damaged. Then, the best solution is to find a new version of given file, or download it again from the same source as before (maybe for some reason in the previous session the download of the XPI file has not been completed and it cannot be opened properly).
If you have additional information about the XPI file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on XPI file.