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Features & Capabilities
User Growth & Download Statistics
Manifest V2 Add-on
- By:
- Afnan Khan
- Daily users:
- 1,527 -6
- Rating:
- 4.29 (62)
- Version:
- 2019.7.8 Last updated: 2019-07-08
- Version code:
- 4789536
- Creation date:
- 2017-12-01
- Risk:
- High risk impact Low risk likelihood
- Permissions:
- menus
- storage
- bookmarks
- <all_urls>
- webRequest
- webRequestBlocking
- Size:
- 107.25KB
- Email:
- af*****@outlook.com
- Source:
- Firefox Add-ons Store
- Data ingested on:
- 2026-06-21
- Compare stats and ranking:
- Open in Sidebar vs Open in Sidebar
- Open in Sidebar vs Sidebar navigator
- Open in Sidebar vs Open in Sidebar
Contact the developer
Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
User Reviews
Users love that the add-on restores a simple, minimal sidebar feature and find it very useful. The top complaints are the inability to resize the sidebar, lack of configuration (default URL, per-site rules, persistence), and occasional layout/loading integration issues; several users also ask for UI improvements like a toolbar button and better dark-theme icon visibility. Pros
- Restores a removed/expected Firefox sidebar feature — many users appreciate getting it back
- Simple, minimal and works as expected — lightweight and easy to use
- Handy and useful for specific tasks (users mention messaging, music, bookmarks)
Cons
- Sidebar width is not resizable / appears too large — repeated annoyance and workaround requests
- Limited configuration: no default/startup URL, no per-site or pinned-tabs rule to always open in the sidebar, and no persistence (e.g., keep an app playing when closing)
- Layout/loading issues and site integration problems (messengers, some pages) plus limited UI options — requests for a toolbar button, context-menu control, and better icon visibility in dark theme
Recent reviews
This is cool, but if you switch in your Sidebar from "Open in Sidebar" to any other tab (e.g. "History"), then any playback running there stops.
Also it allows you to have only one instance of "Open in Sidebar"
by *****, 2026-05-27
only feature its missing is a default site that opens when you open the sidebar
by Ba*****, 2026-04-02
I remember it was a basic feature in firefox. I never understood why they removed it. Thank you for bring it back. Would be nice to have back also the option in bookmarks to open a link by default in sidebar (could you make it? maybe using bookmark tags? when you tag it "sidebar", you open this way?)
Thank you for the great job!
by Ma*****, 2025-09-28
Is Open in Sidebar Safe?
Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.
Open in Sidebar requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk impact analysis details
- Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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- Medium ****** ** ********* *** ******* ******** **** **** *********** *** ********* *** ********* ******* *** *****
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.
Open in Sidebar has earned a fairly good reputation and likely can be trusted.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
- Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Good **** ********* *** **** **** *******
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