Install Flash Video Downloader (FVD) ( ) with Firefox Nightly for Windows 10 圆4. You can then unzip the extension into this directory.Critical Issues with Flash Video Downloader Crashing Firefox Nightly on Startup after XPI Self-Modification for Malware Injectionįlash Video Downloader (FVD) is updating its own XPI to version v16.3.8 unreviewed by Mozilla, circumventing Mozilla add-on review process (it seems for many releases over the past 6 months, over which period it completely stopped even attempting to make releases on ), hacking itself, to inject CSP rules and scripts into its manifest for malware domain .įlash Video Downloader (FVD) v16.3.8 installed in this way is causing Firefox Nightly to crash every time on startup.Įvery time I launched Firefox I ended up with another FVD_Downloader_Module.exe process spawned on Firefox startup, even when not using FVD, and those processes remain, even after closing Firefox (they may or may not remain or continue to pile up in cases when Firefox does not crash), so that I ended up with 12+ (and growing) number of FVD_Downloader_Module.exe processes running forever in the background. xpi file extension.Īlternatively, you can also create another directory in extensions named after the add-on ID. It will need to be renamed to the add-on ID, while being careful to keep the. To add the extensions to this directory, you should include the extension's XPI file. This will require you to know the add-on ID for each extension that you wish to add to this directory.
We now need to add our extensions into the extensions directory that we created above. Inside of that directory, create another called extensions. First, create a directory called distribution. In the Firefox ESR installation directory, you will need create some required directories. These steps also work if you are customizing the Windows installer. This can be done easily on the Firefox ESR build from the Firefox installation directory.
In an enterprise environment, it may be necessary to deploy Firefox with a set of predefined extensions.
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