mozilla-mobile/focus-ios is an open source project licensed under GNU General Public License v3.0 or later which is an OSI approved license.
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No privacy labels, no updates? Firefox Focus iOS
reddit.com/r/privacy | 2021-03-29
Development of this project is not currently a high priority. Because of this, we cannot guarantee timely reviews or interactions on this repository. If you would like to contribute to one of our other iOS projects, we recommend checking out Firefox iOS. We greatly appreciate your interest in and contributions towards Focus and look forward to working with you on other projects! - https://github.com/mozilla-mobile/focus-ios
Google Removed ClearURLs Extension from Chrome Web Store
news.ycombinator.com | 2021-03-24
I use Firefox Focus on mobile which lets you reset your entire browser and cookie history with one click. It also has some built-in tracking protection and content blocking.
While it doesn’t solve the issue of add-ons, it has enough of a privacy focus to make me feel better about reducing my footprint on the mobile.
It’s a pity that development is not as active as it used to be, but looks like Firefox are still supporting the project 
How to make downloads on Firefox focus work like Firefox?
reddit.com/r/firefox | 2021-02-16
Sounds like incorrect behavior from the server sending the file as plain/text. Most browsers do some detection of servers that are not configured correctly which is why it works in Firefox iOS. There is not really much you can do to besides use Firefox iOS. You could report your problem to the Focus team but it might be a while before that is fixed.