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I just experienced this after running npm update.

Disclaimer: I am not using Firebase though. I'm working with Next.js.

@KenSharp, the issue is not with Firebase or Next.js either, but with third-party packages that depend on inflight.

You can confirm this by running the command npm ls inflight. The result is a trace/list of packages that are dependents of the inflight package.

You can read more here https://stackoverflow.com/questions/76412987/why-npm-ls-does-not-return-all-dependencies/78529720#78529720

im also facing same issue when running " install -g firebase-tools "

these are the warning :

npm warn deprecated inflight@1.0.6: This module is not supported, and leaks memory. Do not use it. Check out lru-cache if you want a good and tested way to coalesce async requests by a key value, which is much more comprehensive and powerful.

npm warn deprecated rimraf@3.0.2: Rimraf versions prior to v4 are no longer supported

npm warn deprecated glob@7.2.3: Glob versions prior to v9 are no longer supported

i event updated the npm nvm and firebase tools to latest versions.
Note: i want to connect firebase with flutter project.

Hey all, thanks for reporting this. I've taken a pass thru and updated all the dependencies to minimize the use of the deprecated packages. I've also opened issues for our dependencies that are still using outdated inflight/glob, and will update once they've released versions that no longer use them.

i also facing these warnings during installation of vite , react or next js.What should i do to solve these warnings

npm warn deprecated inflight@1.0.6: This module is not supported, and leaks memory. Do not use it. Check out lru-cache if you want a good and tested way to coalesce async requests by a key value, which is much more comprehensive and powerful.
npm warn deprecated @humanwhocodes/config-array@0.11.14: Use @eslint/config-array instead
npm warn deprecated rimraf@3.0.2: Rimraf versions prior to v4 are no longer supported
npm warn deprecated glob@7.2.3: Glob versions prior to v9 are no longer supported
npm warn deprecated @humanwhocodes/object-schema@2.0.3: Use @eslint/object-schema instead