Firefox 57 came in an upgrade to Slackware --Current today. I have not tested it extensively, but here are my first impressions.

I did not put a stopwatch on it, but it is indeed noticeably, even significantly faster.

It left my privacy settings intact (such as no third party cookies, delete history on exit). It also left my preferred search engine (Startpage) still set as default.

It did not touch my bookmarks or any of the appearance themes I've installed.

It did break my extensions, but there are already a number of compatible extensions available. I found substitutes for what I consider my most important plugins (classic NoScript and speed dial). I'm still looking for a proper user agent changer plugin. If classic NoScript becomes available for it, I'll probably go back to that.

It came with an activated "Gnome Shell Integration" plugin, which I turned off.

It also synced, following my existing sync settings. (That's I how ended up with two script blockers on Firefox 52 on the laptop--I disabled classic NoScript and went with the new one).

So far v. 57 looks like a nice piece of work.

User Agent Switcher 1.1.0 by Alexander Schlarb

I like that one.

Thanks for the recommendation; I'll take a look at it next time I get to spend some quality time with --Current.

It's not a big deal--I use one mostly so I can have the correct user agent icon here at LQ.

That is exactly the same reason I run one as well!!

Hi Frank. Could you recommend a substitute for noscript please? There are a few available via the firefox plugins search but nothing familiar

Cheers

My personal noscript alternative is umatrix. It's a bit more complex and granular, but therefore also gives you more control.

A new NoScript is in progress. That said, my recent reading indicates features of uMatrix overlaps with NoScript. For some users the overlap might be sufficient. I don't use uMatrix and can't offer any observations. I can't imagine using any web browser without some kind of JS white list manager. I have no clue why that is not a standard feature in FF.

The one I picked was "No Script Suite Lite." It's not as sophisticated as classic NoScript--it's basically a whitelist, rather like NoScript's "allow all from host." It does not have, for example, NoScript's "temporarily allow" option.

As I tend to be careful and pedestrian about the sites I visit (I visit mostly newspapers and the like, places generally legitimate and above board, as I am a political blogger by avocation), it should work for now.

I also use a hosts file that blocks most advertising pop-ups.

If someone recommends a better one, I will certainly be open to it.

Plus, I am trusting that Mozilla has vetted the add-ons it has in the library.

I just tried it and it seems to be noticeable faster than previous versions, which is good, since I had stopped using it in spite of me, due to its sluggishness.

Here's a tidbit I just discovered.

If you were using the QuickNote plugin that is not currently at least compatible with Firefox 57 (which I have used heavily for HTML snippets, links I want to remember but not bookmark, and the like), you can find your notes here:
/home/[username]/.mozilla/firefox/[some string].default/chrome/quicknote?.txt

I was able to paste my notes in the new note-taking plugin that I'm using with v. 57.

I suspect that, if you were using a different note taking plugin that kept your notes locally, the path would be similar.

I think NoScript is working already in Firefox 57. It works on Windows at least, so possibly on Linux as well.

I just reinstalled NoScript on my Firefox installs and it appears to be working well under Linux and Windows.

Thanks, odiseo77. I just grabbed NoScript and removed NoScript Suite Lite. It seems to work just fine on Mageia.

Now that addons are getting caught up its working quite nicely...
had to make a few substitutes, Self Destruct cookies is out replaced with Cookie auto delete
NoScript is back and once you get used to the new UI is quite good, Ublock origin was already there, https etc...

No replacement for UnPlug yet so I am back to copying the link to smplayer...

what does Self Destruct Cookies do, may I ask? Have to admit I tend to just allow only select sites to set cookies either permanently (like LQ) or temporarily (like Amazon) and leave it at that.
I think I'm happy with NoScript but it will take a while to get used to what it's actually doing with each setting and I do worry it makes page loading noticeably slower but that may just be bd luck when I was first using it.