Final answer:
Ignoring local customs is not a consideration for international firms; it's a critical mistake to avoid. Firms should focus on legal, cultural, and economic conditions.
Step-by-step explanation:
The international business consideration that international firms must take into account when conducting business in countries other than their own does not include ignoring local customs. In fact, understanding and respecting local customs is crucial. Firms should pay close attention to legal and regulatory differences, cultural variations, and economic conditions. Ignoring local customs can lead to a negative reputation and possible failure in international markets. Therefore, acknowledging and abiding by the cultural norms and local practices is essential for international businesses to succeed.