Must have old Firefox extensions , and how to install them

With Firefox version 57 , named Firefox quantum , plugins also known as extensions or add-ons , created using the XUL and XPCOM technologies , have stopped working .

Firefox versions before 57 , had a lot of plugins , which are still useful today . This tutorial , will show how to install a version of Firefox , with which , the old plugins still work , and it will detail , the most useful plugins .

Must have old firefox extensions tutorial

Table of contents Installing a Firefox version with which old plugins work Must have classic Firefox plugins Appearance and behaviour Download Management Privacy and security Web development

1- Installing a Firefox version with which old plugins work

One way of installing a version of Firefox with which old plugins work , is to download , and install , a version of Firefox prior to 57 . Old versions of Firefox , can be gotten from this link .

It is not advisable to use an old version of Firefox , because of security issues . An alternative way , which can be used along the newest version of Firefox , is to download , and install , waterfox classic or palemoon .

Once a version of Firefox less than 57 , or a Firefox alternative , has been downloaded and installed , and to be able to install classic extensions , the extension Classic Add-ons Archive must be installed . This extension can be downloaded from GitHub .

For the Classic Add-ons Archive plugin , to be successfully installed , unsigned extension installation must be allowed . This can be done by visiting the about:config page in Firefox , or one of its alternative , and toggling the xpinstall.signatures.required setting to false .

Also , the multi-process mode must be disabled . This can be done by visiting the about:config page in Firefox , or one of its alternative , and setting any browser.tabs.remote.autostart to false .

2- Must have classic Firefox plugins

2.1- Appearance and behaviour

AutoCopy 2
- Auto copy selected text . Some options can be set , such as copying the selected text as plain text , without any formatting or styling , if the Copy Plain Text 2 extension is installed .
- caa:addon/autocopy-2
Copy Plain Text 2
- Adds a context menu to copy selected text , without any formatting or styling . It can be used with AutoCopy 2 , which allows the automatic copying of selected text .
- caa:addon/copy-plain-text-2
FirePreview
- When the mouse is hovered over a link , and the control key is held , this extension will open a small window , which allows to preview a link .
- caa:addon/firepreview
Google search link fix
- Cleans a copied searched result link , so that , it will only contain , the found webpage address .
- caa:addon/google-search-link-fix
Regex Find
- Enables searching in a webpage , using regular expression .
- caa:addon/regex-find
Screengrab!
- Saves or copies a part of a webpage, or a complete webpage , as a screen shot .
- caa:addon/screengrab-fix-version
SpellcheckEverything
- Checks a webpage for spelling errors .
- caa:addon/spellcheckeverything
Status-4-Evar
- Shows a status bar in the bottom of Firefox . Some extensions require a status bar to function correctly .
- caa:addon/status-4-evar
Tab Mix Plus
- Advanced tabs management for Firefox . Allows , for example , to duplicate tabs , undo close tabs , copy one , or all tabs URL , reload one , or all tabs , protect tabs , save tabs on exit .
- caa:addon/tab-mix-plus
Text Link
- This extension does not change the appearance of a text link , what it does , is that it linkifies a text link , so that if it is double clicked , it will be opened .
- caa:addon/text-link

2.2- Download Management

DownThemAll!
- A download manager , and accelerator , that can be used with Firefox .
- caa:addon/downthemall
FireFTP
- An ftp / sftp client , which can be used with Firefox .
- caa:addon/fireftp

2.3- Privacy and security

Flagfox
- Displays in the location bar , a flag which points to where the server is located . On right clicking on this flag , additional information , like the IP address of the server , can be gotten .
- caa:addon/flagfox
HeaderControlRevived
- Allows in its preferences to control sent HTTP headers. It gives the ability , to change : the Referrer , User-Agent , and the browser accepted languages .
- caa:addon/headercontrolrevived
Live HTTP Headers
- View sent and received HTTP headers .
- caa:addon/live-http-headers
uBlock Origin
- An ads blocker .
- caa:addon/ublock-origin
Privacy Badger
- Heuristically blocks , spying ads , trackers , and cookies .
- caa:addon/privacy-badger17

2.4- Web development

Auto Reload
- Will automatically reload a page , when its local files change .
- caa:addon/auto-reload
Clear Site Cache
- Adds a button to the toolbar , to quickly erase a specific site cache .
- caa:addon/clear-site-cache
ColorZilla
- A color picker , a webpage color analyzer , and a color palette browser .
- caa:addon/colorzilla
CSSsir
- A very useful extension , that allows to generate : text and box shadows , rgba colors , transforms , transitions , linear gradients , text and font styles . It also allows to convert between rgb and hex colors , and between em and px .
- caa:addon/csssir
CSS Reloader
- Adds a context menu , which allows reloading the CSS of a webpage , without reloading the webpage itself .
- caa:addon/css-reloader
Custom Style Script
- Allows to inject custom scripts or styles into any webpage .
- caa:addon/custom-style-script
Font Finder
- Analyze font related information , like : color , font-family , letter-spacing , text-decoration … On right clicking the Font Finder icon , more options are available , like for example : replacing , disabling , and adjusting font properties .
- caa:addon/font-finder
HeadingsMap
- Shows headings outline , and creates an HTML 5 outline of a webpage .
- caa:addon/headingsmap
HTMLEditor
- An HTML , JavaScript , CSS , in the browser editor , like codepen or JSFiddle .
- caa:addon/htmleditor
Html Validator
- This is an HTML validator , used to validate HTML in a webpage .
- caa:addon/html-validator
Reload Skip Cache Button
- Reloads a webpage , while skipping browser cache .
- caa:addon/reload-skip-cache-button
Wappalyzer
- Identifies the software used to create a website .
- caa:addon/wappalyzer
Web Developer
- This tool adds various tools which are useful for web development . For example , tools that will enable or disable browser cache , or that will allow editing and viewing cookies , or that will allow checking and manipulating images and forms information ...
- caa:addon/web-developer