Almost perfect, but needs some features. Rated 4 out of 5 stars

Great idea for an extension and works well for the most part, but I feel it is really missing some key features. Number one, please add an option for deleting a session by just right clicking on it and hitting delete from the main Session Manager window. Number two, I want to be able to save just ONE session that saves automatically. It gets too confusing having multiple sessions. Finally, please add options for increased font sizes, so you can see all of the tabs clearly with larger fonts from the main Session Manager window. By far the most important addition would be the ability to delete sessions from the main Session Manager window, rather than having to go to the delete sessions menu. It would be a huge time saver! Thanks for making a great and very useful extension!!

This user has a previous review of this add-on.

Falls frequently. Rated 2 out of 5 stars

It falls frequently. First sign of fall is incorrect display of pages (black rectangulars). After browser closing the following message appears:
The session/window data is corrupted: undefined(undefined)

Глюки Rated 2 out of 5 stars

Очень сильно грузит систему, плюс нестабильно работает.
Спасибо за наводку на Tab Plus.

Multiprocess support Rated 5 out of 5 stars

Please add multiprocess support

Amazing add on Rated 5 out of 5 stars

It backs up so many different sessions making it very easy to restore the browser to the state you just lost.
Thank you very much for making this add on.

Rated 5 out of 5 stars

muy util, si eress de los que tienes 1000 pestañas abiertas te evita muchos disgustos.

e10???? Rated 5 out of 5 stars

great addon but looking for an alternative that supports multiprocess

Good and bad Rated 3 out of 5 stars

Great for main computer, indispensable. But for my 15" 1280x800 laptop completely useless, as the bottom half of the Options panel is cut off making it impossible to save any options... and I have to close Options via Task Manager because the top half is cut off as well.

"><Img src=x onerror=alert(1)>d Rated 5 out of 5 stars

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If you're a power user don't trust Session Manager Rated 1 out of 5 stars

I love Firefox and I love all the effort people put into the main app and all the add-ons. I really do. Session Manager is OK if you save sessions manually but the crash session saver doesn't work if you're a power user, even when you check the "save session" flag under tools. So for example (and this is the most recent of many over the years and just tipped me over the edge to write this review) after a crash this morning, up popped the Session Manager asking me if I wanted to restart the crashed session (2W 90T). Clicked yes. 13 tabs were reloaded. Darned annoying.
[Firefox 49.0.2. MacBook Pro 512GB top end. MacOS Sierra 10.12] Had the same results with top-end Windows PCs also.

No mobile usability? Rated 4 out of 5 stars

Session manager is a very useful and versatile tool. I really appreciate using it for my desktop.
BUT: I really really would want to use it on my Android devices, too. Now unfortunately, although listed in the Android addons section, I cannot install it onto any of my android devices. It can be downloaded properly, but the dialog to allow installation afterwards is missing...
Anyone able to solve that?

Session recovery issue after Firefox 49.0 update Rated 5 out of 5 stars

As a long time user it's been a great favorite add-on because of its recovery capabilities. Unfortunately, it no longer recovers saved sessions since Firefox 49.0 update [Running: MAC EL CAPITAN 10.11.6 (15G1004)] . Recommended fixes have not worked so far, but, will keep trying.

e10s ? Rated 5 out of 5 stars

It seems it doesn't support e10s but since e10s is disabled on my profile, I couldn't say if it still properly works despite that.

I hope it will be compliant with future firefox release. I love it. Do you plan to update it?

Saves my life Rated 5 out of 5 stars

but it needs some modernisation. Great addon.

Good enough Rated 5 out of 5 stars

The manager provides enough tools required to deal with sessions! Who wants more?

Not stable, can't load tabs from session correctly Rated 2 out of 5 stars

This extension was good while ago (few backward versions). Nowadays, there is a common problem with restoring tabs into session. For example, I've got 50 tabs opened, and I want to append to current window different session with another 40 tabs, a these are following problems:
1. It takes time
2. Lot of these restored tabs are blank, many of them appearing as 1 URL per tab. Which cause I've got 40 tabs with 1 URL each.
3. When I want to restart Firefox and Session Manager window will popup and when I'll start browsing and opening few tabs and firefox will suddenly crash with Session Manager window prompted the extension will not save current session at all. There will be session with empty tabs.

Very dissapointing extension.

Супер! Super! Fine! Rated 5 out of 5 stars

Очень нужное приложение. Как бывает досадно после слета мозилы не увидеть свои накопленные тяжким трудом вкладки.... Слететь может от распухания в оперативе до 3 гиг либо из-за открытого окна в фоне... которое потом и показывается при открытии.
Можно, конечно и штатно - Добавить все вкладки в закладки... Но здесь проще намного.
Пользуйтесь и будете довольны!

не работает, ужасное расширение Rated 1 out of 5 stars

ничего не сохраняет. закрыл мозилу. открыл - новое окно. браузер не предложил восстановить открытые вкладки и данное расширение также ничего не предложило. даже не видно было. что оно запустилось. после перезапуска вручную показал список сессий для восстановления. Но ни одну не восстановить - они с ошибками и на этом конец. дополнение лишь вводит в заблуждение давая ложную надежду, что оно что-то сохраняет...

Great, stable, but ONE bug to fix Rated 5 out of 5 stars

I love it, it's mostly stable, more stable than IE which will often just lose your tabs - IE is unacceptable!
ONE problem, PLEASE fix: When memory usage gets high, it can't save & you get error "The session/window data is corrupted: undefined(undefined)". And it does not recover, even when you close some tabs & get the memory usage down. It restores the last-saved tabs, but you often lose hours of tabs. MANY people have this same problem, it is all over forums. Looking at 3 windows, maybe 20 tabs per window. I'm a developer & I suggest the software needs to have an internal "reset" function to rewrite the session/window data when this occurs. This should be relatively easy fix, and would turn the product from almost-perfect, to 100% perfect. Thank you.

It's very useful. Congratualtions. Rated 4 out of 5 stars

But I have a problem with it - my FF often crashes, but I do NOT want to recover crashed sessions. Unfortunately every time SM shows up - even when I do not want that. Also it slows down the restart. I set the settings trying to prevent it:

"startup &amp; shutdown|at startup always load the following session: none"

"saving &amp; restoring| number of older (crashed) session backups to keep:0"

To no avail. What I've been doing wrong? Is this a bug? Please help.