Earlier quoted context omitted.
Very much this. I've attempted (largely unsuccessfully) to try to use Pocket (also a Mozilla product) to address this. The problem with Pocket is that it gets worse the more you use it. From four years ago: https://old.reddit.com/r/dredmorbius/comments/5x2sfx/pocket_... A couple of those issues have been addressed. There's now "find in page" on the Android app, and editing tags is very slightly improved. But overall,…
I use Pocket a lot. There are like 10 easy feature requests I'd love for them to do but I find it at least usable for storing stuff and finding it later once you get used to it. Most of the problems in that post have been at least partly addressed, although I don't ever use tags so have no comments about those.
Consider that if Mozilla hadn't lied about how it was going to open source it when they announced they were buying Pocket (alternatively, if people actually held them accountable instead of demonstrating that the public's short memory means that you can lie about pretty much anything), then someone would have probably fixed at least a few of those.
If all you're doing is using it to store stuff, then instead of signalling to a company that bad behavior pays off by rewarding them for it, consider using Zotero instead, which doesn't have a history of being insultingly mendacious and by default keeps your data private (in the form of reliable, bog standard files on your own disk). Or, if you're willing to suffer through slightly more geekery, there's Perkeep/Camlistore.