On some server like on localhost this RewriteBase parameter can be disabled by adding ‘#’ characters (without quotes) before RewriteBase

RewriteBase Disabled Example: #RewriteBase /

and .htaccess still works fine but some server case like 000webhost, if RewriteBase paramater not defined, then this .htaccess file will not works and you will get some error pages where should to rewrite.

To enable rewriting, you must set RewriteBase correctly by this:

RewriteBase /

Here some example setting for tuneup your Mozilla Firefox:

browser.cache.memory.capacity : 65536
browser.cache.disk_cache_ssl : true
browser.xul.error_pages.enabled : true
content.interrupt.parsing : true
content.max.tokenizing.time : 3000000
content.maxtextrun : 8191
content.notify.backoffcount : 5
content.notify.interval : 750000
content.notify.ontimer : true
content.switch.threshold : 750000
network.http.max-connections : 32
network.http.max-connections-per-server : 8
network.http.max-persistent-connections-per-proxy : 8
network.http.max-persistent-connections-per-server : 4
network.http.pipelining : true
network.http.pipelining.maxrequests : 8
network.http.proxy.pipelining : true
nglayout.initialpaint.delay : 750
plugin.expose_full_path : true
signed.applets.codebase_principal_support : true

Another Firefox Tweaks and descriptions:

nglayout.initialpaint.delay
Description: time to wait before an initial reflow attempt during page rendering (?)
Type: integer
Unit: milliseconds
Default: 250
Recommendation: keep in synch with content.notify.interval (?)
content.notify.ontimer
Description: enable timer-based reflows during page rendering (?)
Type: boolean
Default: true
Recommendation: leave on default.
content.notify.interval
Description: time steps for the initial reflows defined by content.notify.backoffcount (?)
Type: integer
Unit: milliseconds * 1000 (?)
Default: 120000
Additional Info: nsHTMLContentSink.cpp, Bug 72138
Recommendation: do not set this below 100000. Synchronize with nglayout.initialpaint.delay (?) In contrary to what other tweak examples say, setting this to 100 is absurd.
content.notify.backoffcount
Description: number of initial reflows during timer-based rendering (?) After this number the page is only reflowed when the calculation of the layout of larger parts of the page is finalized (?)
Type: integer
Default: -1 (never)
Example: 10
Additional Info: nsHTMLContentSink.cpp
Recommendation: experiment with some values depending on the bandwidth/latency of your connection and overall system speed.
More advance Firefox Tuning:

content.switch.threshold
Description: (?)
Type: integer
Unit: milliseconds * 1000 (?)
Default: 750000
Additional Info: nsHTMLContentSink.cpp
Recommendation: keep in synch with nglayout.initialpaint.delay and content.notify.interval (?)
content.maxtextrun
Description: (?)
Type: integer
Unit: kilobytes (?)
Default: 8191
Additional Info: nsHTMLContentSink.cpp, Bug 77540
Recommendation: leave on default.
content.interrupt.parsing
Description: enable interruption of parsing to return to the application’s event loop from time to time (?)
Type: boolean
Default: true
Recommendation: leave on default.
content.max.tokenizing.time
Description: time after which parsing is interrupted to return to the application’s event loop (?)
Type: integer
Unit: milliseconds * 1000 (?)
Default: 3 * content.notify.interval
Example: 2250000
Additional Info: nsHTMLContentSink.cpp, Bug 76722
Recommendation: leave on default. Lowering this might make Firefox more responsive during loading of large pages, but might also raise total page load times. If you change this, make it a multiple of content.notify.interval.

HTTP Connection Preferences:

These options control the number of opened HTTP connections. If you raise them, do it reasonably. Changes like these are at least partly responsible for the infamous /. effect.

network.http.max-persistent-connections-per-server
Description: maximum number of persistent (keep-alive) connections per server.
Type: integer
Default: 2 (as per recommendation in HTTP/1.1 specification)
Recommendation: none
network.http.max-persistent-connections-per-proxy
Description: maximum number of persistent (keep-alive) proxy connections.
Type: integer
Default: 4 (as per recommendation in HTTP/1.1 specification)
Recommendation: none
network.http.max-connections-per-server
Description: maximum number of HTTP connections of any type to a single server.
Type: integer
Default: 8
Recommendation: none
network.http.max-connections
Description: maximum number of total HTTP connections.
Type: integer
Default: 24
Recommendation: none

HTTP Pipelining Preferences:

Pipelining is a HTTP/1.1 feature that speeds up transfers by requesting several objects at once without waiting for a response first. More info…

network.http.pipelining
Description: enable pipelining for non-proxy connections.
Type: boolean
Default: false
Additional Info: might still lead to problems with servers that don’t support pipelining correctly and that are not on the internal blacklist.
Recommendation: true
network.http.proxy.pipelining
Description: enable pipelining over a proxy.
Type: boolean
Default: false
Additional Info: see network.http.pipelining.
Recommendation: true
network.http.pipelining.maxrequests
Description: maximum number of consecutive requests in one pipeline.
Type: integer
Limit: 8
Default: 4
Additional Info: nsHTTP.h. Optimal value depends on connection bandwidth/latency.
Recommendation: 8. While it doesn’t hurt to set it to 100 like in other tweak examples, it will have no effect whatsoever because of the mentioned limit.
network.http.pipelining.firstrequest
Description: enable pipelining on first request to a server.
Type: boolean
Default: false
Additional Info: since it doesn’t seem to get picked up anywhere in the source, this preference doesn’t seem to be used. First requests are obviously never pipelined.
Recommendation: do not use this preference. While it probably doesn’t hurt, it will have no effect either.

Useful Cache Preferences:

browser.cache.memory.capacity
Description: amount of memory assigned to memory cache.
Type: integer
Unit: kilobytes
Default: 4096 in older builds, dynamically assigned depending on total amount of memory in newer builds (?).
Recommendation: set this to a high fixed value if you have enough RAM to noticeably improve back/forward button performance while going many steps back/forward (?)
browser.cache.disk.capacity
Description: amount of disk space assigned to disk cache.
Type: integer
Unit: kilobytes
Default: 50000
Recommendation: none
browser.cache.disk_cache_ssl
Description: switch to enable caching of objects served over a secure connection (SSL).
Type: boolean
Default: false
Recommendation: true on systems where it is secure to cache these objects.
browser.cache.disk.parent_directory
Description: path to parent directory of Firefox’ disk cache.
Type: string
Default: profile folder
Additional Info: use double backslashes as path separators in Windows. Not existing directories will be created if they don’t exist.
Example: E:\\Folder1\\Folder2
Recommendation: none

Useful Miscellanous Preferences:

browser.xul.error_pages.enabled
Description: use an error page instead of a modal dialog when a connection error occurs.
Type: boolean
Default: false
Additional Info: Bug 28586. This is not enabled by default because the implementation lacks some functionality.
Recommendation: true (in combination with Show Failed URL)
plugin.expose_full_path
Description: show full path to plugins in about:plugins.
Type: boolean
Default: false
Recommendation: true
signed.applets.codebase_principal_support
Description: this is a preference to be used while developing scripts that need enhanced privileges. It allows potentially security-critical JavaScript to bypass the signing stage (?)
Type: boolean
Default: false
Recommendation: unfortunately setting this to true this is the only working way I’m aware of to selectively grant JavaScript access to the clipboard. The user will still be asked everytime a script/applet requests access to privileges. If you’re using this, be sure to only grant access for scripts/hosts you trust, otherwise this can be a huge security risk, because it opens your system to virtually everything (!!!)

Mozilla Firefox Tuning and Tweaks, TuneUp Your Fox now!