### Is this a feature request or a bug? Bug/feature? Both? A feature to avoid the bug ### What is the current behavior? running `web-ext run` triggers too many watchers and it throws errors: >Error from chokidar : Error: ENOSPC: System limit for number of file watchers reached ### What is the expected or desired behavior? I would like to customize which files are watched so it doesn't output a long list of warnings for every file in the node_modules folder. ### Version information (for bug reports) * **Firefox version**: * **Your OS and version**: * Paste the output of these commands: ```` node --version && npm --version && web-ext --version ```` v12.18.4 6.14.6 5.0.0