Chrome etc with a lot of rust on Sierras, oddly (8)

'chrome etc' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'lot of rust on sierras oddly' is the wordplay.
'lot of rust' becomes 'brow' (I can't justify this - if you can you should give a lot more credence to this answer).
'on' says to put letters next to each other (in a down clue, letters appear on others).
'oddly' means one should take alternating letters (letters in odd-numbered positions).
The alternate letters of 'sierras' are 'sers'.
'brow'+'sers'='BROWSERS'

'with a' acts as a link.

Can you help me to learn more?