Yes when we use block explorer repeated searches we make from same computer can be used to link different cryptocurrency addresses to us which is major privacy risk. To avoid this is best to use block explorers that care about your privacy. Look for services that are open source so people can check their code or ones you can run yourself on your own computer. Also choose explorers with clear privacy policies that promise not to track or sell your data and use them with Tor or VPN to hide your online activity. Good examples of these are open source explorers like Esplora and Mempool.space. We should keep in mind that even with these services using VPN or Tor is most important step to protect our privacy.
The concerns you raise about privacy when using block explorers are very valid and crucial in the crypto space. Identifying yourself through repeated searches from the same location can potentially link one's crypto addresses, creating a significant privacy gap. To mitigate this risk, choosing a privacy-focused block explorer is highly recommended. Prioritize services that are open source, allow independent code review, or can be run locally on your own computer. A transparent privacy policy, explicitly guaranteeing no tracking or data sales, is also a determining factor. Furthermore, using Tor or a VPN in conjunction is a crucial step in obscuring your online activity. Open-source explorers like Esplora and Mempool.space are excellent examples of this, reinforcing the importance of using Tor or a VPN as a key layer of defense.