Common Build Errors¶
When setting up Firefox, you may encounter some other build errors or warnings that are not fatal. This document is to help you determine if the error you’re running into is a fatal one or not.
VSCode Java extension¶
If you happen to have the Java extension installed in VSCode, there’s
a chance that the “Problems” tab in the integrated terminal will
display an error about Cannot run program [...]/mozilla-unified/mach
.
This is because the extension does not know how to parse the mozilla-central
repository and specifically the mach
command runner.
This will not prevent you from building and running Firefox.
ERROR glean_core¶
This is a non-fatal error and will not prevent you from building and
running Firefox. You might see this text in the console after running
./mach run
. The specific text might appear as:
Error setting metrics feature config: [...]
.
Region.sys.mjs¶
This is a non-fatal error, this will not prevent you from building and
running Firefox. You might see this text in the console after running
./mach run
and the specific text might look like:
console.error: Region.sys.mjs: Error fetching region
.