very confusing about how to set it up

🤯🤯🤯 Cannot just simply OPEN NEW TAB since now. WTF?
Without disturbing my brain with opening setup page instead again and again.
But why? Why?!

I need to have ability to open NOT only http or https as a new tab! What about "about:blank" AT LEAST? 🤨

Don't know what is suddenly going wrong but this is taking forever to load

Currently not really useful due to https://bugzilla.mozilla.org/show_bug.cgi?id=1409675

after opening new tab it takes 1-2 seconds for New Tab Override to load before it can be used.
too long for me, it breaks my flow. when i open new tab i want to start typing my search right away (same as in default empty new firefox tab).

What's the point if the url bar is already filled and each time I have to clear it first to browse

I'm sure this works great for what it was designed for. However, I build my own Home Page using images on my harddrive as my link, not text. Because New Tab Override cannot load local images it's pointless.

Storing html file in extension does not work.

Will not allow loading local files on Ubuntu / Linux.

No, "Mozilla doesn't allow this functionality" is not an answer. I have a different extension, with the same local file, working perfectly fine on Windows 8.1 but it refuses to load on Ubuntu. This extension doesn't even make an attempt to load the file. It's HTML, CSS, JS so the semi support doesn't work (and isn't a real fix because I want changes to be made immediate which is why it's a local file in the first place). The only use I have for this extension does not work so it is immediately uninstalled.

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Edit: I don't think I can reply to developer comments so I will here instead.

Firstly, I don't need to make a GitHub issue because this isn't GitHub. This is the review section of mozilla.org where I review the extension I downloaded that doesn't do what I wanted it to. Secondly, I did say exactly what is wrong. If the path does not start with http:// or https:// the extension refuses to load without even trying. This is not a technical reason, this is a developmental choice and why the other extension loads on Windows (because it doesn't give up the moment I input my file path). Lastly, the other extension works on Windows 8.1 and 10 merely by inputting file:// (path to file) despite it too saying it's not supported. The steps to reproduce the two star review are: 1) choose new URL 2) input anything that's not http:// or https:// 3) immediately uninstall and leave a poor review reflecting this design choice.

Thank you for making the extension (I didn't rate it one star) but the extensions design choice makes it unusable for local file hosting which works despite it not being officially supported. All I need(ed) it to do was auto open an HTML file from my machine (not cache but actually open to access ./css, ./js, etc) but I have since worked around this issue.