And to pre-empt any replies; your proposed solution must support Windows, Linux (X11 and Wayland), MacOS, iPhone, Android, Chromium and Firefox.
If you are a website, that's easy, you are actually making the correct choice with Electron insofar that you want a browser.
If you're doing an application not a webpage, then we're walking W+L+Mac+Phones, that's more tricky. I'm assuming for a second you want a usable UI (otherwise we'd be using Electron again :P ) so we're talking two applications at least, one for mobile, one for desktop + maybe iPads.
And then it's usually already too pricey to bother:
Web frontend devs are far cheaper than application developers.
Might as well just do a website, runs in everything. Only need to develop once.
Updating is immediate with a website, don't have to do any deployment/upgrade/downgrade plans.
As Communism said, yeah I was ment a web application. No need to spend dev time working on a different version of your app if you can just reuse the web version.
I know the guy working on makepad is trying to solve this problem along with vr headsets, Apple tv, etc. It's really painful because of dependency bloat messing with build times so he ended up rewriting a bunch of things 🤷♂️.