TiddlyFox, but then Firefox Apocalypse (57) broke it, hard, which basically makes me despise Mozilla to the core and quite likely never look back at this monster of not-caring-about-backwards-compatibility again.
For legacy Load Tabs Progressively, https://mozilla.github.io/extension-finder/ finds five extensions, none of which is truly an alternative.
An alternative might be:
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replacements for: https://addons.mozilla.org/firefox/addon/context-search/
- https://addons.mozilla.org/firefox/addon/contextsearch-web-ext/
- https://addons.mozilla.org/firefox/addon/selection-context-search/
(First add-on is more handy because of possibility of auto-update of used search engines.)
guid=findandreplace@notreal.org is replaced by
https://addons.mozilla.org/firefox/addon/find-replace-for-text-editing/
guid=cookieexporter@krk is replaced by https://addons.mozilla.org/firefox/addon/cookies-txt/
https://addons.mozilla.org/firefox/addon/dafizilla-table2clipboard/ is replaced by https://addons.mozilla.org/firefox/addon/table-to-excel/
An excellent alternative to the panorama feature of Tab Groups:
– an extraordinarily good first release. One to watch …
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Actually you can tell the devs to make it the same. Both Chrome/ium and Firefox support Web Extensions, so one add-on should work on all these browsers. Only in the rare case that some APIs are not (yet) supported by Firefox, they would have to make some changes in the add-on.
i found here https://forums.lastpass.com/viewtopic.php?f=12&t=280465&p=994695&hilit=firefox+copy#p994695
Please, no, not until Firefox includes what’s required.
– and/or Session Boss.
I was initially very disappointed to find Mozilla bug 1378651 – surprised that session management extensions can no longer offer 
history – but all things considered, 1378651 is not a showstopper. If I switch back to Firefox, I can make do without the feature.
(I’d like to do more than moan about gaps in APIs etc., but I don’t have the skills for patches or new features …)
InlineDispositionV2
An alternative to legacy InlineDisposition.
Experimental, so it might be too soon to list it at https://mozilla.github.io/extension-finder/
Positive test result: https://addons.mozilla.org/addon/inlinedispositionv2/reviews/1150608/
After writing that, I found this extension that was written at the end of last year: https://addons.mozilla.org/en-US/firefox/addon/inlinedisposition-reloaded/
It’s a lot like mine, but it covers an extra case that even the original InlineDisposition didn’t cover. I’m not sure why it isn’t getting suggested by the extension finder.
Thanks, @kwierso. We haven’t been updating the extension finder much recently because there’s been some traffic drop-off to the site and because searching for compatible extensions on AMO returns much better results now than it did when Quantum first launched.
We’ve just updated our documentation to encourage folks to search for alternative extensions on AMO first before trying the extension finder.
That bit of info will become important again in six days (September 5, 2018) when ESR 52 users are upgraded to ESR 60 and their legacy extensions stop working.
Are there any for Dashlane? Massive fans.
We’re currently working on an email parser WebExtension that will sit over Gmail/Outlook and extract data from emails in order to extract into tools like Salesforce or Dynamics CRM as a user opens that particular email. Think receiving multiple website enquiries or leads by email.
There will also be an option to extract future emails of the same template automatically.
Well…
My favorite add-on obviously is my little own one:
It’s available on AMO obviously:
It replaces an older “Offline QR Code Generator” for Firefox < 57, but adds many features and is unique. 
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ScrapBook stop work in Firefox 57, I created a new extension works similar with it named ScrapBee, see https://addons.mozilla.org/zh-CN/firefox/addon/scrapbee/, wish it helps anybody.
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so now that you are done randomly screwing over anyone who has ever created something useful for firefox can you create an addon that supports legacy addons? i cant do anything with no available addons
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A post was merged into an existing topic: [FIXED] Certificate issue causing add-ons to be disabled or fail to install