I used FF for years, then due to the constant changes lately, I switched to Chrome, and now, after FF 57 was released, I was eager to test FF again to see if it's worth to actually come back. It's in Chrome that I first came into contact with uMatrix, looking for an extension similar to NoScript. Seeing that there are many users here who switched from NoScript as well, I thought to re-post what I posted back on Chrome WebStore, regarding importing a long whitelist from an older version of NoScript - maybe it helps someone:

Below you have 10 easy steps to import NoScript's Whitelist into uMatrix (especially if that list is long - like mine was, since I came to Chrome from Firefox):

1) export NoScript's Whitelist to a text file, from within NoScript (if you didn't do that already)
2) edit that textfile using Notepad++
3) select all with CTRL+A
4) click Search/Replace from the menu and tick Regular Expression
5) type "\n" for "Find what:" textbox and " * allow\n* " for "Replace with:" textbox (without quotes, but including spaces)
6) click Replace All, close the dialog, modify the first and the last line in the list to match how the other lines look, then copy the modified contents of the text file again, using CTRL+A
7) go to My Rules tab within uMatrix's Options (Dashboard)
8) click Edit in the Temporary Rules column
9) paste the text you copied at step 6) at the end of the already existing temporary rules
10) click Save, then Commit in the Temporary Rules column

That's it - now you have the whitelist from NoScript into your uMatrix extension. You can then make any further modification to the settings in that list on an individual basis, which is much easier than having to rebuild that list from scratch all over again...

RESPONSE TO THE DEVELOPER:

I wasn't aware that you can directly import those rules when I first wrote this review back on Chrome (27.07.2017), and I didn't know whether you provided the functionality right from the start or it was added afterwards, so I assumed that you can't directly import those rules from NoScript - hence my reviews.

On the conversion type, those are just my preferences, especially given the way NoScript interprets them (i.e. general over specificity for a domain), maybe others prefer them to be a little more restrictive - that's why I said that you can make further adjustments afterwards, on an individual basis. Personally, I need frames to be allowed too on most of the whitelisted domains, as they provide functionality I sometimes need (think streamed media, for example), thus, from my POV, there wouldn't be much difference between a broader whitelist rule and allowing images+css+script+frame (it's allow all vs allow almost all). Bottom line, it might be better for regular users the way you designed it, since it's preferable to be more protected over allowing all and make some mistakes. Me, I know what I'm doing, so I can safely go with all or nothing style.

Simply great add-on. I jumped Noscript's bandwagon since everything I used to know on it have changed, even the functionality and I am really sad to see that (looking at you mozilla)

Much appreciated Raymond!!

My wish list for this addon:
*Clear click and XSS protection

I currently use a hosts file for most of my filtering, but this is great for controlling scripts!

公開当初からの「愛用品」です。
Tracking やクロスサイトリクエストなどを可視化し、完璧に制御できます。
このアドオンなしでは、当世の「魑魅魍魎が跋扈する」サイバー環境では、安心してオンラインサービスに接続できません。

この拡張機能（uMatrix）は、*For advanced users.* との明示がされている *上級ユーザー向け* です。
※ サイトやトラフィックでのリクエスト項目を細分化し、明示し、完璧な制御を行うことができます。
しかし、上級者を前提に公開している拡張機能なので、作者は一切のサポートを受け付けません（公開当初は、サポートメールや GitHub での仕組みがありました。しかし、未熟者からの Howto 指導要請や Help me!! が引きも切らなかったため、嫌気が差して、一切の窓口を閉鎖してしまいました）。
ご利用されるに当たっては、使い方（How to use HTTP Switchboard: Two opposing views：https://github.com/gorhill/httpswitchboard/wiki/How-to-use-HTTP-Switchboard:-Two-opposing-views）の理解（習熟）が必要になります。

使い方について簡単に解説しておきます。
実装後、アドレスバーに「icon」がセットされます。
その icon を Click すれば、コントロールパネルが開きます。
コントロールパネルは、
横軸に「Requests の種類」別
縦軸に「Requests の名称」別
が方眼状に展開されます。

緑（Requests 許可）：個人情報収集などの心配のないタイプ。
赤（Requests ブロック）：個人情報収集のリスクが確認されているタイプ。
薄い赤（Requests ブロック）：リスクが不明なタイプ。

方眼のマス目は、上下を二分割で有効／無効の切り替えになり、上側をクリックで「緑」、下側が「赤」になります。
任意の変更内容を反映したい場合には、コントロールパネル内の上部にある「Reload」ボタンを押下します。
変更内容を取り消したい場合には、「Reload」ボタンの左にある「消しゴム」アイコンを押下します。
その設定内容をホワイトリストとして、保存したい場合には、同パネル上部の「鍵」ボタンを押下します。

この拡張機能を実装した場合には、当サイトも含め、ログイン画面、通販サイト、アプリのダウンロードなどなど あらゆるタイプの全ての接続先との接続が不能になります。その都度、コントロールパネルから適切な制御を行う必要があります。信頼できるサイトについては「ホワイトリスト」登録（「鍵」アイコンから保存）しておけば、手間を省けます。

おまけ：
◆ Privacy 対策には、
uBO-Scope
uBlock Origin
Google search link fix
Decentraleyes
Cookie AutoDelete
Country Flags & IP Whois
DuckDuckGo Plus （検索エンジン）検索時に於ける Tracking の心配をなくせます。
の実装もお薦めです。

◆「セキュリティー」の考察（※）
＞ Surveillance Self-Defense | Tips, Tools and How-tos for Safer Online Communications
：https://ssd.eff.org/en
※ 出典先は、Electronic Frontier Foundation の会報から

It does what it promises! Great work. Much appreciated

Raymond Hill non sbaglia un colpo. Dopo l'eccellente uBlock ecco uMatrix. E' praticamente perfetto manca solo la possibilità di avere una white list.

Incredibly useful add-on - allows me to block third-party requests on a very granular level, while making it very easy to block or allow on less granular levels as well. The great user interface is intuitive to understand and use. Highly recommended for advanced users.

uMatrix (paired with uBlock and Privacy badger) is an excellent alternative to the new (broken, garbage version) of noscript.

Once you understand the grid interface, setting the levels of script access on a "per site" basis is incredibly good.

Highly recommended.

Nachdem NoScript trotz der monatelangen Vorbereitung auf Firefox Quantum (57) eine derart schlecht designte Version rausbrachte habe ich uMatrix probiert und mich verliebt. Ein sehr gutes Addon. Danke an die Entwickler. Thank you so much for this Addon.

With the current noscript issues, i too tried umatrix and i must say it's quite good ! You can even fine-tune what you are filtering, unlike noscript. It's not straight forward though, but with the help provided by the dev it's all good !

I also came from NoScript. It took some time to get used to uMatrix and whenever I click a new site I often have to do one or few changes. But this happened with NoScript (the old version) as well. Now that I'm used to uMatrix I prefer it over the old NoScript. It's more powerful and also replaces some other extensions as well. I hope that NoScript will soon be back to its former self but for me, I will stay with uMatrix from now on.

Thank you very much for the extension. On chrome, I have been using umatrix for a long time, I understood it right away, there were no problems. On the firefox used a noscript. But due to the fact that the noscript successfully died, I started using umatrix on the filefox. Thank you for not dropping us, improving your child, correcting minor mistakes! Way to keep Raymond!

It takes a little to become accustomed to uMatrix. But it's quiet easy with the help of the wiki on Github. Anyway I love it and can't think of ever going back to a browser without at least the uMatrix addon.

i'm also Coming from NoScript fiasco.

本質的です

I'm another Quantum NoScript refugee. Very glad to have found this alternative which feels superior to even the pre-Quantum NoScript.
It's a bit of a learning curve but worth the effort of reading all available documentation. Once I grasped the basics after a few days, I find I like the ability for easy fine-tune control where required, while having global rules that make me feel safe browsing, with minimal interruption from this extension. A huge thanks to the developer, whose uBlock Origin ad-blocker I've used for some time now on Firefox and Chrome.
Question: I'm currently using "Cookie AutoDelete" extension, but wonder if I could now easily setup uMatrix instead for the same functionality?

I'm a No Script refugee and I'm glad I've found a good replacement. This add-on is fantastic! It's actually MUCH more robust than No Script and offers a lot more control over what elements to block/allow. You won't miss No Script once you get the hang of it.