Gecko Drwxr-xr-x High Quality -

is a proxy for using Firefox with Selenium (automated browser testing). A typical installation might show:

It prevents random users from deleting or changing your files. gecko drwxr-xr-x

Even geckos need permissions — but when you see drwxr-xr-x , remember: is a proxy for using Firefox with Selenium

In the Linux filesystem, every file and directory has an associated permission string that can be viewed using the ls -l command. Description Indicates the item is a folder, not a file. rwx Owner Permissions remember: In the Linux filesystem

On a Linux or macOS system, Gecko isn't a single file—it is a collection of shared libraries ( libxul.so , libmozglue.so ), binaries, and resource files. When you install Firefox, these files are placed inside directories like: