There seems to be a specific problem with registering passkeys, but logging in should work fine if you have already registered a passkey for a site. Not sure if this is the case with all password managers, or just Bitwarden.
It’s their only product to have an iPad app as well.
The only app that hasn't yet been optimized for iPad is the Calendar app. Otherwise, Proton has proper iPad apps for everything else.
Read the article. Google already requires a warrant before handing out this data.
This is wrong. By enabling privacy.resistFingerprinting you cannot make yourself more unique in Firefox because you’re already unique. I would read this guide by the Arkenfox project about fingerprinting. The guy has worked for the Tor browser, so he knows his stuff. The summary is that the privacy.resistFingerprinting is the best tool that Firefox has against fingerprinting, but it can only ”fool naive scripts.” If you’re really worried about fingerprinting and want to defeat advancing fingerprinting, the only option is to use either Tor or Mullvad Browser depending on your threat model.
I don't think that it captures everything, but according to the Arkenfox project, any additional benefit ClearURLs could have compared to this setup is minimal, and thus, it probably isn't worth to install another extension.
ClearURLs is not really needed anymore since you can enable AdGuard URL Tracking Protection and import Actually Legitimate URL Shortener Tool to uBlock Origin.
Skip Redirect is still fine if you want to continue using it but Smart Referer could be replaced by changing network.http.referer.XOriginPolicy in about:config to 2 like the Arkenfox project recommends. However, note that there could be some issues regarding this setting, so keep that in mind.
Ublock Origin has annoyance filters that you can enable.
Bitwarden is currently working on redesigning their apps, which will also include new native mobile apps that will fix the current speed issues. You can already test them if you are interested.
Even if Bitwarden doesn't have as straightforward implementation regarding the separate email and username fields, you can easily use custom fields to solve this issue. As you also noted, Bitwarden will also autofill these.
Even though Proton’s SimpleLogin implementation is more simple and likely easier to use compared to Bitwarden, it also poses a serious lock-in issue with Proton Pass. If you ever decide to downgrade to a free plan, Proton will disable all your aliases that go beyond the max limit (10) in the free plan. This is a big contrast to even SimpleLogin that will keep all of your aliases operational even if you downgrade to the free plan. I would also take Bitwarden’s alias implementation over Proton Pass because they support multiple different aliasing providers compared to just SimpleLogin. In the past I have had issues registering a SimpleLogin alias for some sites, so all I needed to do was to change to DuckDuckGo that Bitwarden also supports and the site accepted that one. This is also a feature I doubt Proton would never implement because they own SimpleLogin.
Proton’s free version only supports three TOTP logins, so not very usable, and Bitwarden’s Premium plan is only $10 per year, so not a big deal to upgrade to that if you need this feature.