Whenever Uniswap releases a new frontend version, they also publish its CID. To be 100% sure you're not using a compromised frontend, you can load it via CID. An IPFS CID is essentially a SHA256 hash, meaning that even a single byte of change in the underlying content will completely alter the SHA256 hash, ensuring its integrity.
For example, the CID for the latest Uniswap frontend release is QmQZe48wGBwx6z8DuboTG62AYf8BbKd6XYDENefVZUvjyV
https://github.com/Uniswap/interface/releases/tag/web%2F5.72.3
In the latest updates to Planet, we've added a quick way to open any CID via Planet's local IPFS gateway. You can find the "Open IPFS Resource" option under the "File" menu to open either a CID or IPNS.
Compared to simply opening a website via HTTPS, accessing the frontend through a CID introduces concepts that need to be understood and extra steps. However, it also offers an additional layer of security. Give it a try!