Use this as your default browser.

https://f-droid.org/en/packages/com.tasomaniac.openwith.floss/

 

you can just go into your phone's settings and clear defaults.

 

No, it may not show up there.

It should however show up when you go through the settings of the app.

As for not finding the setting to clear all defaults (which will clear for all apps, btw), try this.

(Yes, I realize that this issue seems to be solved, but I loathe the PlayStore and apps from it (basically loathe Google, period.))

Settings
Apps & notifications
App info
overflow (3 dots upper right)
Show system
overflow (again)
Reset app preferences

 

Also, in that app (Open With), you share the link, not just tap it.

Touch and hold any link, and the copy/paste menu will open.

Select share, and then your sharing options will appear.

You may select Open With, which will then open a menu of apps that you have previously selected when setting up Open With.

Alternatively, you can select any other sharing option.

The benefit of Open With is that it is supposed to remember what you use to open different things with, then do that automatically.