Firefox for Android migration is about to begin

Mozilla announced today that it will soon migrate Firefox for Android Nightly installations to the new Firefox Preview for Android Nightly version.
The organization has been working on a new mobile web browser for Android that is based on different technologies than the old. The new web browser will offer advantages over the old including better performance and faster updates according to Mozilla.
Mozilla revealed plans to migrate users of the classic Firefox web browser for Android to the new mobile browser in 2020. Nightly users would be migrated first before users of beta and stable versions of the Firefox web browser would be migrated later that year.
The announcement reveals that the time has come for Nightly versions of Firefox. From next Tuesday (January 21), Nightly versions of the classic Firefox application for Android may be upgraded to the new Firefox browser for Android (which is called Firefox Preview currently).
Based on the previous 6 months of user testing and the positive feedback we have received, we’re confident that Android users will appreciate this new browsing experience and we’re very happy to announce that, as of Tuesday (January 21, 2020), we’re starting to roll it out to our existing Firefox for Android audience in the Nightly app.
Nightly users may be upgraded automatically depending on how updates are configured. If updates are configured to be automatic, Nightly will be migrated to the new version automatically. Firefox for Android Nightly users who don't want that to happen at that point, and there are valid reasons for not wanting to do so at the time of writing, can set updates to manual instead to prevent the migration for the time being. The new mobile browser is also available as a standalone download on Google Play.
Note: Some data will be migrated including open tabs, bookmarks and the browsing history. For passwords to be migrated, a master password cannot be used.
Probably the biggest blocker right now from the point of view of Firefox users is that the new browser does not really support extensions at this point in time. The new browser will support extensions, Mozilla revealed as much in mid-2019, but support will be introduced over time.
The ad-blocker uBlock Origin will be the first add-on that will be supported officially. Full support for WebExtensions comes in late 2020 according to Mozilla.
Closing Words
One of the distinguishing factors between Firefox for Android and Google Chrome is the former's support for extensions. The discussion whether the new Firefox would support extensions, and if so to what degree, felt agonizing.
Considering that extensions are important to many users, Mozilla should probably consider having extensions ready in the new stable version of the browser before it starts the migration.
Now You: have you tried the new Firefox for Android?


thanks you saved my 1000 tabs :)
Fantastic! Thank you! This worked like a charm. Had exactly the same issue in Firefox on a PC and this fixed it.
Thank you for sharing this! Like you, I’d noticed that disabling/re-enabling the extension would work for that browser session, but I hadn’t tried anything yet to force a fix. I’m SO glad it was this easy!
I sure hope the OneTab team issues an official fix ASAP, though. Now that it’s been a few days, they’re starting to get bad reviews, which is unfortunate.
Yes! I also tried the workaround. I also reported this bug to OneTab team on the first day I faced this issue.
Thanks, Ashwin for the fix!
I was nearing desperation when I found your direction. It worked.
Thank you so much.
Hi, OneTab developer here. Sorry for this – it’s not clear why this bug is suddenly happening for some people, but we’re urgently investigating this with the Mozilla/Firefox team and will be providing a fix very shortly.
Thank you so much for sharing this fix! You saved my tabs. The only note/point I would like to add is for Step 2.
Perhaps put a note stating they should copy Step 3 and forward of your tutorial to Word. Once we close Firefox, we lose visibility to your tutorial. For me, I know I would not be able to remember the .bkp.
Again, thank you!
Easy temporary fix: To make OneTab work again, type “about:addons” in your Firefox address bar. Then find OneTab in the list of extensions, and click the blue toggle button twice. This will disable and then re-enable OneTab, and cause it to work again.
We’re working with Mozilla for a permanent fix. Sorry for the inconvenience, this is a very strange issue that is only affecting the Firefox version of OneTab.
I have found by disabling and then re-enable in the add on menu I get my tab back. Short term fix. Will try yours.
Thank you. I thought I had lost a month of digging. I’ll be a little more attentive about exporting the urls from the extension list now. It’s a great tool but Firefox doesn’t always play nice with its extensions.
Good news – I’ve been working with Mozilla all morning to resolve this. Mozilla have confirmed it was due to a bug in Firefox (related to extension permissions downgrades).
To fix OneTab, just go to “about:addons” in your Firefox address bar, click the ‘cog’ icon in the top right, and click ‘Check for updates’. This will upgrade you to OneTab v1.39, which fixes the issue.
Darn, I tried everything here and I still can’t get my tabs back. I even did a full system restore to a point last week hoping that my saved tabs would be in the old .xpi file, but no luck.
I’m pretty disappointed :(
Probably I should’ve been more patient, but now I don’t know how to feel about this. I lost about 900 tabs in the recovery process (I reinstalled OneTab), which, incredible as it sounds, weren’t all just a messy dump I’m never going back to, but actually important stuff (yeah, I have a peculiar workflow).
Trying to suppress the anger and reflecting on what happened, it seems I should blame myself for not having a backup. But surely I couldn’t back it up manually every time I save a tab, it would defy all purpose of having this addon in the first place. A couple of years ago data was stored at “~/.mozilla/firefox/%PROFILE%/jetpack/[email protected]/simple-storage”, and you could back it up with simple crontab. This is no longer the case, this folder is just empty. And since OneTab is closed-source black box, I couldn’t have done anything else as well.
So the only reasonable lesson to be learned is that I actually must stop relying on OneTab, since sooner or later it will let me down again. Fuck it.
I just disable and re-enable. No tabs lost!
I switched from OneTab to Tab Stash (https://addons.mozilla.org/en-US/firefox/addon/tab-stash/) months ago and haven’t looked back. I had never experienced any data loss with OneTab, although I was a bit concerned by some reports of data loss I read about. My main issue was with OneTabs performance, it’s a hog. I had been looking for a replacement and testing out a ton of addons for a couple of months when I finally discovered Tab Stash, and am damn glad I did. I really can’t recommend it strongly enough…
Thanks, bsdaddict. Never tried it, looks nice, but I’m a bit concerned by small number of stashed tabs on these screenshots, not sure if it’d be usable when stashing a lot of tabs. How many tabs do you usually have stashed?
Tab Stash is is a great alternative to One Tab, y’all… I made the switch months ago and am very happy with it.
>DO THIS FIRST: Before trying the following fix, I recommend disabling OneTab and re-enabling it from the about:addons page, to access and regain your tabs.
Worked for me! Many, many thanks!
I know it’s late but ist there an option for chrome on android tablets aswell? My wife hates it that the search bar and Tab list will just come Up again when she Scrolls up