...so that you don't impulse buy/sell portfolio stocks that you're sure you wish to hold long term.

You're going to use Console for any serious portfolio evaluation, annual tax P&L calculation anyway, so hiding stocks in Holdings is a decent measure. Use responsibly though, or you'll end up complaining to Zerodha about missing stocks.

uBlock Origin filter rule:

kite.zerodha.com##div.holdings table > tbody > tr:has-text(/\s+BRITANNIA\s+/)