Its very weird. Both are pretty much the same browser, while mobile seeming totally underpowered, Desktop a bit too much.
Mobile
Links
Tabs
Desktop
way too many context menu entries, the entire reason this project exists.
It seems Firefox tries to please everyones workflow by allowing to do the same action in 2-4 different places. This is weird and clutters the UI extremely. Also Developer tools are integrated, that should be opt-in, as Firefox should be a user browser.
Links
Tabs
Images
Blank page
unified searchbar
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I am sure I forgot something, especially more context options for mobile, for images and more.
Mobile is underpowered but actually has a good approach, it just is not customizable enough but forces this minimalism and one-way-to-do on everyone.
Desktop is cluttered, has no GUI (or even officially documentation) way of changing context entries and seems like a total mess.
Less is often more. If you remove all that bloat you can actually add some buttons, like the home button, the "temporary container button" or the "redo closed tab" button (Addons).
What do you think?