★★★★★ This Extension Unlocked My Inner Productivity Maniac

Okay, full disclosure: I'm the kind of person who has approximately nine billion tabs open at any given time. This extension didn't just help with that; it fundamentally changed how I use my computer.

The basic idea is brilliant: your main page is front and center, and any link you want opens in a sidebar. No more tab switching madness. It's flawless. I can keep a research paper or a tutorial open on the side while I work. I honestly don't know how I lived without it.

But then I fell down the rabbit hole. I discovered you can open a second, completely separate Firefox window, give it a sidebar, and then use Windows' snap feature to dock the first window to the left half of my screen and the second to the right. Boom. Four fully interactive, always-loaded websites on one monitor. It completely defeats the browser's "memory saver" that always unloads my dang tabs—because everything is technically "visible."

And the magic isn't just for browsers. Since Windows lets you snap almost any window side-by-side or into the corners, the combinations are endless. Imagine: my main research tab on the left half of the screen, with a YouTube guide playing in the Side View sidebar. Then I can snap a Discord call live into the top-right quarter, and my notes app into the bottom-right quarter. Three different apps, one screen, no switching. I can even adjust the Side View divider to give more space to my research or the video, on the fly.

Now for the bonus, "this-is-probably-overkill-but-I-love-it" round. I realized that instead of just left/right snapping, you can drag windows to the four corners of your screen for a 2x2 grid. So, theoretically, on one giant monitor, you could have four separate Firefox windows, each with its own main page and sidebar. That's EIGHT tabs on one screen! With two monitors, you're looking at a ludicrous 16, and with three... a frankly ridiculous 24.

Let's be real: unless you're working on a stadium Jumbotron or an 8K monitor, actually using a setup with 8 tabs on one screen would be a recipe for squinting and frustration. It's a fun party trick to think about, but not terribly practical. But the fact that the extension allows for this kind of insane flexibility is just cool.

For the realistic use case of mixing a few browser windows with other apps, or just having 2-4 pages on a screen, though? It's an absolute, no-question-about-it game-changer. If you multitask for research, coding, or even just comparison shopping, this is a must-have. It feels like a superpower.

The idea is great, but the implementation suffers a lot.

Other users say: For some reason it enforces music.youtube as mobile website

This is NOT limited to YT though. Russian e-shop ozon.ru is affected as well.

Whenevet i click any link in the shop user account it is open in mobile view instead of normal! I had to click RELOAD after every navigation.

I don't know what variables are set, cookies, or WebSQL or WebStorage or anything else - but probably the extension makes them polluted.

It is said, that "by default side view opens mobile rendering" but!

1. WHY is it rendered, wasting my traffic, memory and CPU, when the side view is CLOSED ?
2. WHY does it leaks its mobile state to the main tab?
3. WHY is it rendered BEFORE main tab, instead of AFTER ? Common sense says the side-view is a mobile ghost of desktop pages, then they should follow as wingmen, not lead as commanders!!! That would have also concealed (not fixed, but concealed at least) the leaking state error.

Had to disable it. Unsable. Pity, because the diea is great!

P.S. feature suggestion, the Opera (original one, not Chrome skin) had a "attached window" feature, guess it was CTRL+J by default. That side-by-side window was showing all the links in the current page, in a simple list, flat or idented. This could be a helpful and lightweight added mode to the extension. It arguably could have more use for generic users than heavy and intrusive mobile view.

работает на ура!

The side view in Firefox is an awesome built-in feature for switching tabs. It makes managing tabs so much easier and more organized. I really hope this feature stays and gets improved in future updates of Firefox!

A extensão era ótima, até o momento que foi acessar o music.youtube.com.
Estava com problema para ouvir minhas músicas, até que descobri que o problema é dessa extensão. Tive então que desinstalar.

Estaba buscando a algo similar a como está la vista lateral de Microsoft Edge aquí en Firefox y me pareció genial, hasta que ejecuté YouTube Music con una interfaz terrible de vista de celular en escritorio, pausándose el contenido al cambiar de pestaña. También noté que WhatsApp no puedo usarla en esa vista por más que expanda la vista lateral.

Realmente me parece una excelente extensión de navegador pero estos errores hacen que tenga que estarla deshabilitando para evitar que surjan esos fallos

The add-on is a perfection.

What would be nice to improve:

1) if Firefox Multi-Account Containers is used the session should be duplicated into the side view container as well.
2) No way to open browser extension (like Browser Notepad) in the side view

BUG:
For some reason it enforces music.youtube as mobile website even when the url stays the same & regardless of the setting to enforce desktop or mobile website. This also applies when side-view ist even opened. The website looks definitely different & when i pess CTRL+D my music pauses all the time which makes this Extention unusable :(

SUGGESTION:
- Show adress bar for both windows
- Shortcut Key to open/ close Side-View Sidepanel directly

Cool idea but needs a bit work to not be more of a hassle than a help. <3

I'd like to use an option within Firefox to have my social media in the sidebar instead of using Ferdium (or something like that), so that when I open another application in the sidebar it doesn't close and close everything I was previously viewing. I don't mind the resources that this might consume.

i found that this extension have conflict with youtube music. When not focusing on youtube music tab, the player will automatically stopped immediately. Its only starting if the user is opening the youtube music tab. To fix that, you need to remove this extension

Would be great if the page didn't reload every time I switch to a different sidebar extension, though I think this has more to do with the way sidebar extensions work in general than this one in particular. Other than that, the only feature I would suggest adding is a navigation bar specifically for the side view page (including address bar, back, forward, and refresh; maybe even the ability for multiple tabs within the side view - make it sort of a mobile browser within the desktop browser).

This was what I was looking for! #firefox4ever

It's not as good as the split tab view in Microsoft Edge. The quality difference is night and day lol.

The implementation is a bit clunky. It has some issues:

- The Back and Forward navigation doesn't work! 😦
- The Context menu is a smaller version than the Context menu when opened in the normal panel. It misses multiple entries, like the top navigation icons.
- It doesn't support loading pages by drag & drop from the Bookmarks toolbar or the address bar's lock icon.
- Also, Dark Reader doesn't work in the Side View panel. 🤷

It's a pity that this add-on is implemented half-baked. Because split tab functionality is very useful.

Its nice to read some page, but when you click in a link, the link opens on the other side of the screen.

I think this would be better if the tabs were independents. I mean, I could easily change the website by clicking on navbar.

Brave does it in a better way.

Just what I was looking for. Thanks!

Finally! I have been waiting for years for the devs to allow unrestricted width of the side view. It was fixed at a ridiculous small width. Why did it take so long!?