# Tower Http > [Source](../../src/tower_http/add_extension.rs.html#1-167) ## Pages - [Module add_extension Copy item path](add-extension.md): Available on - [Module auth Copy item path](auth.md): Available on - [Module body Copy item path](body.md): Available on - [Module catch_panic Copy item path](catch-panic.md): Available on - [Tower-HTTP Documentation](compression.md): Available on **crate features`compression-br`or`compression-deflate`or - [Tower-HTTP Documentation](cors.md): Available on **crate feature`cors`** only. - [Tower-HTTP Documentation](decompression.md): Available on **crate features`decompression-br`or`decompression-deflate`or - [Tower-HTTP Documentation](follow-redirect.md): Available on **crate feature`follow-redirect`** only. - [Tower-HTTP Documentation](index.md): Expand description - [Tower-HTTP Documentation](propagate-header.md): Available on **crate feature`propagate-header`** only. - [Tower-HTTP Documentation](request-id.md): Available on **crate feature`request-id`** only. - [Tower-HTTP Documentation](sensitive-headers.md): Available on **crate feature`sensitive-headers`** only. - [Module set_header Copy item path](set-header.md): Available on - [Tower-HTTP Documentation](timeout.md): Available on **crate feature`timeout`** only. - [Tower-HTTP Documentation](trace.md): Available on **crate feature`trace`** only.