No.
The only OpenStreetMap based navigation app with live traffic data is Magic Earth. It’s not foss, but gratis.
They get the traffic data from some third party, not by following their users like gmaps. That is the reason live traffic is only available in just some countries: https://www.magicearth.com/feature-availablity/#hd_traffic
He says “powered by or funded by Google”. Firefox depends on Google financially, most of the income of Mozilla comes from Google paying for being the default search engine.
They try to diversify their income (Firefox VPN, email alias service, etc.), but anything they try gets a huge backlash from the community, and still small compared to the the money from google.
I found they have a newsletter, that sounds like an acceptable middle ground, not good, not terrible.
RSS is not even enabled on the Newz page on the website.
FFUpdater supports Android 5+: https://f-droid.org/packages/de.marmaro.krt.ffupdater/ You can install a lot of browsers from there, maybe one of them supports this phone: https://github.com/Tobi823/ffupdater
Also check slimsocial, it’s a facebook client, supports Android 4.4+ and it lists arm7 support: https://f-droid.org/hu/packages/it.rignanese.leo.slimfacebook/
And new Chinese phones (Redmi, HMD, etc) are really cheap, they are good as a backup smartphone. I know it sounds terrible, but you can’t really do anything with planned obsolescence. Our time is short on this planet, waiting for websites on old hardware simply doesn’t worth it, you should spend this time on more important things.
No. It means they get the data from somewhere else, maybe from some carsharing app, or from some government db from car counting thingies mounted on traffic lights, etc. There are other sources to get traffic data ftom, but usually following users is more convenient and reliable
They wont tell us where they get it from, they only say it’s not generated via this app. They are followimg someone, but not me.